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Premium Marine Quality Parts

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Groco Ibv-F Bronze Flanged Adaptor For In-Line Ball Valve To Thru-Hull - Ibvf-2000 - 34-Ibvf2000F1

Groco, Thru-Hulls & Seacocks
$167.39

NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Ibv-F Bronze Flanged Adaptor For In-Line Ball Valve To Thru-Hull - Ibvf-1500 - 34-Ibvf1500F1

Groco, Thru-Hulls & Seacocks
$143.53

Adapter eliminates dangerous thread mis-matches between thru-hulls and in-line valves and valve damage in OEM installations. Accepts a standard thru-hull fitting into the base and a standard in-line valve (or other tapered thread component) on top. Also provides a safe, sturdy assembly when in-line valves are used as seacocks.

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Groco Ibv-F Bronze Flanged Adaptor For In-Line Ball Valve To Thru-Hull - Ibvf-1250 - 34-Ibvf1250F1

Groco, Thru-Hulls & Seacocks
$110.98

NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Ibv-F Bronze Flanged Adaptor For In-Line Ball Valve To Thru-Hull - Ibvf-1000 - 34-Ibvf1000F1

Groco, Thru-Hulls & Seacocks
$97.63

Adapter eliminates dangerous thread mis-matches between thru-hulls and in-line valves and valve damage in OEM installations. Accepts a standard thru-hull fitting into the base and a standard in-line valve (or other tapered thread component) on top. Also provides a safe, sturdy assembly when in-line valves are used as seacocks.

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Groco Hthc-S #316 Ss Hose Thru-Hull 90 Degree With Bronze Nut - Hthc-750-S - 34-Hthc750Sf1

Groco, Thru-Hulls & Seacocks
$78.19

Includes locknut.

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Groco Hthc-S #316 Ss Hose Thru-Hull 90 Degree With Bronze Nut - Hthc-2000-S - 34-Hthc2000Sf1

Groco, Thru-Hulls & Seacocks
$249.59

Includes locknut.

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Groco Hthc-S #316 Ss Hose Thru-Hull 90 Degree With Bronze Nut - Hthc-1500-S - 34-Hthc1500Sf1

Groco, Thru-Hulls & Seacocks
$270.79

Includes locknut.

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Groco Hthc-S #316 Ss Hose Thru-Hull 90 Degree With Bronze Nut - Hthc-1250-S - 34-Hthc1250Sf1

Groco, Thru-Hulls & Seacocks
$153.29

Includes locknut.

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Groco Hthc-S #316 Ss Hose Thru-Hull 90 Degree With Bronze Nut - Hthc-1000-S - 34-Hthc1000Sf1

Groco, Thru-Hulls & Seacocks
$96.49

Includes locknut.

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Groco Hth750 Bronze Thru-Hull - Hth-750 - 34-Hth750F1

Groco, Thru-Hulls & Seacocks
$46.41

Includes locknut.

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Groco Hth625 Bronze Hose Thru-Hull - Hth-625 - 34-Hth625F1

Groco, Thru-Hulls & Seacocks
$37.59

Includes locknut.

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Groco Hth500 Bronze Thru-Hull - Hth-500 - 34-Hth500F1

Groco, Thru-Hulls & Seacocks
$30.45

Includes locknut.

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Groco Hth2000 Bronze Thru-Hull - Hth-2000 - 34-Hth2000F1

Groco, Thru-Hulls & Seacocks
$132.09

Includes locknut.

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Groco Hth1500 Bronze Hose Thru-Hull - Hth-1500 - 34-Hth1500F1

Groco, Thru-Hulls & Seacocks
$101.49

Includes locknut.

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Groco Hth1250 Bronze Hose Thru-Hull - Hth-1250 - 34-Hth1250F1

Groco, Thru-Hulls & Seacocks
$84.17

Includes locknut.

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Groco Hth1125 Bronze Thru-Hull - Hth-1125 - 34-Hth1125F1

Groco, Thru-Hulls & Seacocks
$71.13

Includes locknut.

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Groco Hth1000 Bronze Hose Thru-Hull - Hth-1000 - 34-Hth1000F1

Groco, Thru-Hulls & Seacocks
$63.83

Includes locknut.

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Groco Hth Stainless Steel Hose Thru-Hull - Hth-750-S - 34-Hth750Sf1

Groco, Thru-Hulls & Seacocks
$48.19

Includes locknut. Stainless Steel.

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Groco Hth Stainless Steel Hose Thru-Hull - Hth-625-S - 34-Hth625Sf1

Groco, Thru-Hulls & Seacocks
$48.19

Includes locknut. Stainless Steel.

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Groco Hth Stainless Steel Hose Thru-Hull - Hth-500-S - 34-Hth500Sf1

Groco, Thru-Hulls & Seacocks
$55.29

Includes locknut. Stainless Steel.

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Groco Hth Stainless Steel Hose Thru-Hull - Hth-2000-S - 34-Hth2000Sf1

Groco, Thru-Hulls & Seacocks
$147.49

Includes locknut. Stainless Steel.

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Groco Hth Stainless Steel Hose Thru-Hull - Hth-1500-S - 34-Hth1500Sf1

Groco, Thru-Hulls & Seacocks
$119.09

Includes locknut. Stainless Steel.

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Groco Hth Stainless Steel Hose Thru-Hull - Hth-1250-S - 34-Hth1250Sf1

Groco, Thru-Hulls & Seacocks
$97.89

Includes locknut. Stainless Steel.

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Groco Hth Stainless Steel Hose Thru-Hull - Hth-1125-S - 34-Hth1125Sf1

Groco, Thru-Hulls & Seacocks
$59.59

Includes locknut. Stainless Steel.

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Groco Hth Stainless Steel Hose Thru-Hull - Hth-1000-S - 34-Hth1000Sf1

Groco, Thru-Hulls & Seacocks
$58.19

Includes locknut. Stainless Steel.

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Groco Hsth Bronze High Speed Standard Length Thru-Hull W/Nut 3/4" - Hsth-750-W - 34-Hsth750Wf1

Groco, Thru-Hulls & Seacocks
$31.19

Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Hsth Bronze High Speed Standard Length Thru-Hull W/Nut 2" - Hsth-2000-W - 34-Hsth2000Wf1

Groco, Thru-Hulls & Seacocks
$144.59

Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Hsth Bronze High Speed Standard Length Thru-Hull W/Nut 1" - Hsth-1000-W - 34-Hsth1000Wf1

Groco, Thru-Hulls & Seacocks
$49.69

Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Hsth Bronze High Speed Standard Length Thru-Hull W/Nut 1-1/4" - Hsth-1250-W - 34-Hsth1250Wf1

Groco, Thru-Hulls & Seacocks
$87.89

Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Hsth Bronze High Speed Standard Length Thru-Hull W/Nut 1-1/2" - Hsth-1500-W - 34-Hsth1500Wf1

Groco, Thru-Hulls & Seacocks
$127.79

Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Fth Bronze Flush Thru-Hull With Nut - Fth-750-W - 34-Fth750Wf1

Groco, Thru-Hulls & Seacocks
$38.59

Includes locknut. Bronze.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Fth Bronze Flush Thru-Hull With Nut - Fth-1500-W - 34-Fth1500Wf1

Groco, Thru-Hulls & Seacocks
$124.33

Includes locknut. Bronze.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Fth Bronze Flush Thru-Hull With Nut - Fth-1000-W - 34-Fth1000Wf1

Groco, Thru-Hulls & Seacocks
$56.22

Includes locknut. Bronze.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Fbv Bronze Full-Flow Tri-Flange Seacock - Fbv-750 - 34-Fbv750F1

Groco, Thru-Hulls & Seacocks
$113.79

Patented field reversible handle allows you to select the closed position orientation (Clockwise or Counterclockwise) that best suits the installation. Handle has square hole to accept standard ratchet, to help reach valves in hard-to-reach location and eases operation of hard to actuate valves. Chrome plated solid brass ball (not a hollow ball). Stainless steel handle and hardware. PTFE seats and seals. Drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Fbv Bronze Full-Flow Tri-Flange Seacock - Fbv-3000 - 34-Fbv3000F1

Groco, Thru-Hulls & Seacocks
$1,027.59

Patented field reversible handle allows you to select the closed position orientation (Clockwise or Counterclockwise) that best suits the installation. Handle has square hole to accept standard ratchet, to help reach valves in hard-to-reach location and eases operation of hard to actuate valves. Chrome plated solid brass ball (not a hollow ball). Stainless steel handle and hardware. PTFE seats and seals. Drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Fbv Bronze Full-Flow Tri-Flange Seacock - Fbv-2500 - 34-Fbv2500F1

Groco, Thru-Hulls & Seacocks
$773.99

Patented field reversible handle allows you to select the closed position orientation (Clockwise or Counterclockwise) that best suits the installation. Handle has square hole to accept standard ratchet, to help reach valves in hard-to-reach location and eases operation of hard to actuate valves. Chrome plated solid brass ball (not a hollow ball). Stainless steel handle and hardware. PTFE seats and seals. Drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Fbv Bronze Full-Flow Tri-Flange Seacock - Fbv-2000 - 34-Fbv2000F1

Groco, Thru-Hulls & Seacocks
$426.19

Patented field reversible handle allows you to select the closed position orientation (Clockwise or Counterclockwise) that best suits the installation. Handle has square hole to accept standard ratchet, to help reach valves in hard-to-reach location and eases operation of hard to actuate valves. Chrome plated solid brass ball (not a hollow ball). Stainless steel handle and hardware. PTFE seats and seals. Drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Fbv Bronze Full-Flow Tri-Flange Seacock - Fbv-1500 - 34-Fbv1500F1

Groco, Thru-Hulls & Seacocks
$263.09

Patented field reversible handle allows you to select the closed position orientation (Clockwise or Counterclockwise) that best suits the installation. Handle has square hole to accept standard ratchet, to help reach valves in hard-to-reach location and eases operation of hard to actuate valves. Chrome plated solid brass ball (not a hollow ball). Stainless steel handle and hardware. PTFE seats and seals. Drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Fbv Bronze Full-Flow Tri-Flange Seacock - Fbv-1250 - 34-Fbv1250F1

Groco, Thru-Hulls & Seacocks
$194.59

Patented field reversible handle allows you to select the closed position orientation (Clockwise or Counterclockwise) that best suits the installation. Handle has square hole to accept standard ratchet, to help reach valves in hard-to-reach location and eases operation of hard to actuate valves. Chrome plated solid brass ball (not a hollow ball). Stainless steel handle and hardware. PTFE seats and seals. Drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Fbv Bronze Full-Flow Tri-Flange Seacock - Fbv-1000 - 34-Fbv1000F1

Groco, Thru-Hulls & Seacocks
$157.59

Patented field reversible handle allows you to select the closed position orientation (Clockwise or Counterclockwise) that best suits the installation. Handle has square hole to accept standard ratchet, to help reach valves in hard-to-reach location and eases operation of hard to actuate valves. Chrome plated solid brass ball (not a hollow ball). Stainless steel handle and hardware. PTFE seats and seals. Drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bvs2 Seacock/Strainer Combo - Bvs-2 - 34-Bvs2F1

Groco, Thru-Hulls & Seacocks
$48.09

Service Repair kit contains sight glass gaskets, cap o-ring, and valve driver seals

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Groco Bvs Bronze Ball Valve/Strainer Combo 3/4" - Bvs-750 - 34-Bvs750F1

Groco, Thru-Hulls & Seacocks
$1,221.99

For most air conditioning, refrigeration, generator and small main engine raw water supply. Combines raw water strainer with full flow seacock to simplify installation and maintenance. Features bronze castings, SS full flow ball, full flow pipe size, 1/4" turn open/close, no internal tie rods and filter basket material is #304 SS. Strainer top may be rotated in 90° increments to simplify plumbing.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bvs Bronze Ball Valve/Strainer Combo 1" - Bvs-1000 - 34-Bvs1000F1

Groco, Thru-Hulls & Seacocks
$1,594.49

For most air conditioning, refrigeration, generator and small main engine raw water supply. Combines raw water strainer with full flow seacock to simplify installation and maintenance. Features bronze castings, SS full flow ball, full flow pipe size, 1/4" turn open/close, no internal tie rods and filter basket material is #304 SS. Strainer top may be rotated in 90° increments to simplify plumbing.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bvs Bronze Ball Valve/Strainer Combo 1-1/4" - Bvs-1250 - 34-Bvs1250F1

Groco, Thru-Hulls & Seacocks
$2,084.99

For most air conditioning, refrigeration, generator and small main engine raw water supply. Combines raw water strainer with full flow seacock to simplify installation and maintenance. Features bronze castings, SS full flow ball, full flow pipe size, 1/4" turn open/close, no internal tie rods and filter basket material is #304 SS. Strainer top may be rotated in 90° increments to simplify plumbing.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bvs Bronze Ball Valve/Strainer Combo 1-1/2" - Bvs-1500 - 34-Bvs1500F1

Groco, Thru-Hulls & Seacocks
$2,441.39

For most air conditioning, refrigeration, generator and small main engine raw water supply. Combines raw water strainer with full flow seacock to simplify installation and maintenance. Features bronze castings, SS full flow ball, full flow pipe size, 1/4" turn open/close, no internal tie rods and filter basket material is #304 SS. Strainer top may be rotated in 90° increments to simplify plumbing.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bv Bronze Full-Flow Flanged Ball-Type Seacock - Bv-750 - 34-Bv750F1

Groco, Thru-Hulls & Seacocks
$495.99

Features patented field-selectable and changeable direction of rotation-permits installation in otherwise unusable locations. Tri-flange base and mount hole pattern provide easy retrofit when replacing most popular brands. Handle has a square hole that accepts standard ratchet-helps to reach hard-to-reach valves, and eases operation of hard to actuate valves. Stainless steel ball and stem, PTFE seats and seals. Serviceable when installed, drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bv Bronze Full-Flow Flanged Ball-Type Seacock - Bv-4000 - 34-Bv4000F1

Groco, Thru-Hulls & Seacocks
$6,422.79

Features patented field-selectable and changeable direction of rotation-permits installation in otherwise unusable locations. Tri-flange base and mount hole pattern provide easy retrofit when replacing most popular brands. Handle has a square hole that accepts standard ratchet-helps to reach hard-to-reach valves, and eases operation of hard to actuate valves. Stainless steel ball and stem, PTFE seats and seals. Serviceable when installed, drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bv Bronze Full-Flow Flanged Ball-Type Seacock - Bv-3000 - 34-Bv3000F1

Groco, Thru-Hulls & Seacocks
$3,031.69

Features patented field-selectable and changeable direction of rotation-permits installation in otherwise unusable locations. Tri-flange base and mount hole pattern provide easy retrofit when replacing most popular brands. Handle has a square hole that accepts standard ratchet-helps to reach hard-to-reach valves, and eases operation of hard to actuate valves. Stainless steel ball and stem, PTFE seats and seals. Serviceable when installed, drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bv Bronze Full-Flow Flanged Ball-Type Seacock - Bv-2500 - 34-Bv2500F1

Groco, Thru-Hulls & Seacocks
$1,943.99

Features patented field-selectable and changeable direction of rotation-permits installation in otherwise unusable locations. Tri-flange base and mount hole pattern provide easy retrofit when replacing most popular brands. Handle has a square hole that accepts standard ratchet-helps to reach hard-to-reach valves, and eases operation of hard to actuate valves. Stainless steel ball and stem, PTFE seats and seals. Serviceable when installed, drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bv Bronze Full-Flow Flanged Ball-Type Seacock - Bv-2000 - 34-Bv2000F1

Groco, Thru-Hulls & Seacocks
$1,217.49

Features patented field-selectable and changeable direction of rotation-permits installation in otherwise unusable locations. Tri-flange base and mount hole pattern provide easy retrofit when replacing most popular brands. Handle has a square hole that accepts standard ratchet-helps to reach hard-to-reach valves, and eases operation of hard to actuate valves. Stainless steel ball and stem, PTFE seats and seals. Serviceable when installed, drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bv Bronze Full-Flow Flanged Ball-Type Seacock - Bv-1500 - 34-Bv1500F1

Groco, Thru-Hulls & Seacocks
$865.99

Features patented field-selectable and changeable direction of rotation-permits installation in otherwise unusable locations. Tri-flange base and mount hole pattern provide easy retrofit when replacing most popular brands. Handle has a square hole that accepts standard ratchet-helps to reach hard-to-reach valves, and eases operation of hard to actuate valves. Stainless steel ball and stem, PTFE seats and seals. Serviceable when installed, drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bv Bronze Full-Flow Flanged Ball-Type Seacock - Bv-1250 - 34-Bv1250F1

Groco, Thru-Hulls & Seacocks
$767.59

Features patented field-selectable and changeable direction of rotation-permits installation in otherwise unusable locations. Tri-flange base and mount hole pattern provide easy retrofit when replacing most popular brands. Handle has a square hole that accepts standard ratchet-helps to reach hard-to-reach valves, and eases operation of hard to actuate valves. Stainless steel ball and stem, PTFE seats and seals. Serviceable when installed, drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bv Bronze Full-Flow Flanged Ball-Type Seacock - Bv-1000 - 34-Bv1000F1

Groco, Thru-Hulls & Seacocks
$597.49

Features patented field-selectable and changeable direction of rotation-permits installation in otherwise unusable locations. Tri-flange base and mount hole pattern provide easy retrofit when replacing most popular brands. Handle has a square hole that accepts standard ratchet-helps to reach hard-to-reach valves, and eases operation of hard to actuate valves. Stainless steel ball and stem, PTFE seats and seals. Serviceable when installed, drain plug on both sides for efficient winterization. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Bb Backing Block For Flanged Seacock - Bb-3 - 34-Bb3F1

Groco, Thru-Hulls & Seacocks
$148.69

Flanged seacock installation is improved with the use of a backing block between the valve flange and the hull. Each size fits multiple seacock sizesPress threaded inserts into the hull side of the backing block into the holes that match the seacock flange1/2" thickness is rigid enough for a secure installation but flexible enough to conform to minor hull curvatureWill not swell or absorb moistureMade from an environmentally friendly PVC foam specially formulated for marine applications

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Groco Bb Backing Block For Flanged Seacock - Bb-2 - 34-Bb2F1

Groco, Thru-Hulls & Seacocks
$127.39

Flanged seacock installation is improved with the use of a backing block between the valve flange and the hull. Each size fits multiple seacock sizesPress threaded inserts into the hull side of the backing block into the holes that match the seacock flange1/2" thickness is rigid enough for a secure installation but flexible enough to conform to minor hull curvatureWill not swell or absorb moistureMade from an environmentally friendly PVC foam specially formulated for marine applications

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Groco Bb Backing Block For Flanged Seacock - Bb-1 - 34-Bb1F1

Groco, Thru-Hulls & Seacocks
$100.09

Flanged seacock installation is improved with the use of a backing block between the valve flange and the hull. Each size fits multiple seacock sizesPress threaded inserts into the hull side of the backing block into the holes that match the seacock flange1/2" thickness is rigid enough for a secure installation but flexible enough to conform to minor hull curvatureWill not swell or absorb moistureMade from an environmentally friendly PVC foam specially formulated for marine applications

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Groco Asc2000 Bronze Slotted Hull Strainer With Access - Asc-2000 - 34-Asc2000F1

Groco, Thru-Hulls & Seacocks
$369.99

Access to the thru-hull fitting and seacock beneath the hull strainer is made easy with the patented access door design. No need to remove the entire strainer to clear debris or marine growth. Uses #10 fasteners. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Asc1250 Bronze Slotted Hull Strainer With Access - Asc-1250 - 34-Asc1250F1

Groco, Thru-Hulls & Seacocks
$274.09

Access to the thru-hull fitting and seacock beneath the hull strainer is made easy with the patented access door design. No need to remove the entire strainer to clear debris or marine growth. Uses #10 fasteners. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg753 Sight Glass With Drain Plug For Arg Strainer - Arg-753 - 34-Arg753F1

Groco, Thru-Hulls & Seacocks
$112.99

For the ARG series strainers. Maximum psi is 50. Maximum temperature is 225° F. Sight glass includes drain wingnut.

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Groco Arg750S Bronze Strainer With #304 Ss Basket - Arg-750-S - 34-Arg750Sf1

Groco, Thru-Hulls & Seacocks
$461.79

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg503 Sight Glass With Drain Plug For Arg Strainer - Arg-503 - 34-Arg503F1

Groco, Thru-Hulls & Seacocks
$97.19

For the ARG series strainers. Maximum psi is 50. Maximum temperature is 225° F. Sight glass includes drain wingnut.

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Groco Arg500S Bronze Strainer With #304 Ss Basket - Arg500S - 34-Arg500Sf1

Groco, Thru-Hulls & Seacocks
$448.79

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg3000S Bronze Strainer With #304 Ss Basket - Arg-3000-S - 34-Arg3000Sf1

Groco, Thru-Hulls & Seacocks
$1,375.39

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg2500S Bronze Strainer With #304 Ss Basket - Arg-2500-S - 34-Arg2500Sf1

Groco, Thru-Hulls & Seacocks
$1,284.69

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg2000S Bronze Strainer With #304 Ss Basket - Arg-2000-S - 34-Arg2000Sf1

Groco, Thru-Hulls & Seacocks
$1,103.29

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg1503 Sight Glass With Drain Plug For Arg Strainer - Arg-1503 - 34-Arg1503F1

Groco, Thru-Hulls & Seacocks
$231.69

For the ARG series strainers. Maximum psi is 50. Maximum temperature is 225° F. Sight glass includes drain wingnut.

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Groco Arg1500S Bronze Strainer With #304 Ss Basket - Arg-1500-S - 34-Arg1500Sf1

Groco, Thru-Hulls & Seacocks
$1,041.69

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg1253 Sight Glass With Drain Plug For Arg Strainer - Arg-1253 - 34-Arg1253F1

Groco, Thru-Hulls & Seacocks
$160.29

For the ARG series strainers. Maximum psi is 50. Maximum temperature is 225° F. Sight glass includes drain wingnut.

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Groco Arg1250S Bronze Strainer With #304 Ss Basket - Arg1250S - 34-Arg1250Sf1

Groco, Thru-Hulls & Seacocks
$688.89

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg1003 Sight Glass With Drain Plug For Arg Strainer - Arg-1003 - 34-Arg1003F1

Groco, Thru-Hulls & Seacocks
$142.99

For the ARG series strainers. Maximum psi is 50. Maximum temperature is 225° F. Sight glass includes drain wingnut.

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Groco Arg1000S Bronze Strainer With #304 Ss Basket - Arg-1000-S - 34-Arg1000Sf1

Groco, Thru-Hulls & Seacocks
$647.49

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg Strainer Cap, 1/2" - Arg-501-Pc - 34-Arg501Pcf1

Groco, Thru-Hulls & Seacocks
$40.29

PC non-meatallic strainer cap.

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Groco Arg Strainer Cap, 1" - Arg-1001-Pc - 34-Arg1001Pcf1

Groco, Thru-Hulls & Seacocks
$58.69

PC non-meatallic strainer cap.

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Groco Arg Strainer Cap, 1-1/2" - Arg-1501-Pc - 34-Arg1501Pcf1

Groco, Thru-Hulls & Seacocks
$67.39

PC non-meatallic strainer cap.

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Groco Arg Bronze Strainer With Plastic Basket - Arg-755-P - 34-Arg755Pf1

Groco, Thru-Hulls & Seacocks
$424.79

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg Bronze Strainer With Plastic Basket - Arg-750-P - 34-Arg750Pf1

Groco, Thru-Hulls & Seacocks
$435.89

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg Bronze Strainer With Plastic Basket - Arg-500-P - 34-Arg500Pf1

Groco, Thru-Hulls & Seacocks
$424.79

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg Bronze Strainer With Plastic Basket - Arg-3000-P - 34-Arg3000Pf1

Groco, Thru-Hulls & Seacocks
$1,387.69

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg Bronze Strainer With Plastic Basket - Arg-2500-P - 34-Arg2500Pf1

Groco, Thru-Hulls & Seacocks
$1,232.89

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg Bronze Strainer With Plastic Basket - Arg-1500-P - 34-Arg1500Pf1

Groco, Thru-Hulls & Seacocks
$985.09

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg Bronze Strainer With Plastic Basket - Arg-1250-P - 34-Arg1250Pf1

Groco, Thru-Hulls & Seacocks
$654.99

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Arg Bronze Strainer With Plastic Basket - Arg-1000-P - 34-Arg1000Pf1

Groco, Thru-Hulls & Seacocks
$602.99

Standard single strainers. No tie rods or leaks under pressure or vacuum. Quick and easy mounting system allowing removal of strainer without tools. #304 Stainless steel filter basket. O-ring seals at strainer cap and between strainer head and sight glass. See-thru screw-on strainer cap allows easy, no-tools maintenance. Spanner wrench holes in cover allow the use of SW-2531 wrench. Install with pipe or hose. Do not use chemical or abrasive cleaners on sight glass.

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Groco Aphs30001 Aphs Series External Hull Strainer W/Access Door - Aphs-3000-1 - 34-Aphs30001F1

Groco, Thru-Hulls & Seacocks
$727.49

The patented door provides access to the thru-hull fitting and seacock inlet beneath APHS hull strainers. There is no need to remove the entire strainer to clear nuisance marine growth. C84400 Bronze body and door#304 Stainless steel filter screen with .077" perforationsEasy field replaceable screenPressure relief holes in door castingNOT TO BE USED IN POTABLE WATER SYSTEMS

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Groco Aphs12501 Aphs Series External Hull Strainer W/Access Door - Aphs-1250-1 - 34-Aphs12501F1

Groco, Thru-Hulls & Seacocks
$300.19

The patented door provides access to the thru-hull fitting and seacock inlet beneath APHS hull strainers. There is no need to remove the entire strainer to clear nuisance marine growth. C84400 Bronze body and door#304 Stainless steel filter screen with .077" perforationsEasy field replaceable screenPressure relief holes in door castingNOT TO BE USED IN POTABLE WATER SYSTEMS

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Groco 970150012 Hydromatic Self Cleaning Sea Chest And Strainer, Ports: 1/1/2" Npt A:13.2 ,B: 6.9 ,C:7.6, Outlet: (1) 1/2". 2 3/4",(2) 1" - 970-1500-12 - 34-970150012F1

Groco, Thru-Hulls & Seacocks
$6,414.79

30-second cleaning cycle is automatically performed at user-selected intervalsOptional interface with SSA system ( initiates cleaning cycle when flow is reduced, independent of the pre-set cleaning intervalThe "Purge" option over-rides the selected cleaning interval and performs a one-time 30-second cleaning cyclePowerful macerator grinds debris and discharges overboard below the waterline"Ignition Protected" motors for DC modelsInstallation can be horizontal or vertical (flooded inlet required)C84400 bronze construction

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Forespar T150 Marelon Raw Water Strainer, 1-1/2" - 906166 - 108-906166F1

Forespar, Thru-Hulls & Seacocks
$219.79

Consists of a Marelon head and a polycarbonate bucket with a stainless steel screen. The screw on clear bucket has a replaceable gasket for a positive seal and ease of cleaning. The T-Stainer allows lower installations. Includes a mounting bracket that allows ports to face any direction, Flow rate is 40 GPM+

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Forespar Mf849 3/4" Marelon Flange Mounting Ptfe Seacock - 904010 - 108-904010F1

Forespar, Thru-Hulls & Seacocks
$113.17

Molded from lightweight, high-strength glass-reinforced Marelon™ composite, these flanged seacocks don't corrode, and are highly resistant to UV degradation and abrasion. Their NPS parallel threads can be sealed with PTFE tape or even plumber's putty. These seacocks can also be fitted to mate with bronze fittings. Marelon is UV stabilized and will not deteriorate in sunlight.

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Forespar Mf849 1/2" Marelon Flange Mounting Ptfe Seacock - 904009 - 108-904009F1

Forespar, Thru-Hulls & Seacocks
$106.08

Molded from lightweight, high-strength glass-reinforced Marelon™ composite, these flanged seacocks don't corrode, and are highly resistant to UV degradation and abrasion. Their NPS parallel threads can be sealed with PTFE tape or even plumber's putty. These seacocks can also be fitted to mate with bronze fittings. Marelon is UV stabilized and will not deteriorate in sunlight.

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Forespar Mf849 1-1/2" Marelon Flange Mounting Ptfe Seacock - 904011 - 108-904011F1

Forespar, Thru-Hulls & Seacocks
$250.78

Molded from lightweight, high-strength glass-reinforced Marelon™ composite, these flanged seacocks don't corrode, and are highly resistant to UV degradation and abrasion. Their NPS parallel threads can be sealed with PTFE tape or even plumber's putty. These seacocks can also be fitted to mate with bronze fittings. Marelon is UV stabilized and will not deteriorate in sunlight.

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Forespar Mf810 Marelon Water Strainer, 1-1/2" - 906066 - 108-906066F1

Forespar, Thru-Hulls & Seacocks
$293.80

Made of Marelon® and features an integral mounting bracket and clear polycarbonate lid for ready inspection. The stainless steel strainer basket can be easily removed for cleaning. Flow rate is 40 GPM.

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Forespar Marelon Scoop Strainer, White - 906060 - 108-906060F1

Forespar, Thru-Hulls & Seacocks
$60.18

High-strength, high speed, made of glass-reinforced non-corrosive Marelon®. Two piece construction allows for greater ease in installation.

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Forespar Marelon Scoop Strainer, White - 906059 - 108-906059F1

Forespar, Thru-Hulls & Seacocks
$55.90

High-strength, high speed, made of glass-reinforced non-corrosive Marelon®. Two piece construction allows for greater ease in installation.

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Forespar Cf251 Marelon Full Threaded Mushroom Head Thru Hull W/Nut, White - 906020 - 108-906020F1

Forespar, Thru-Hulls & Seacocks
$68.73

Made from high strength glass-reinforced Marelon. Ideal for use above or below the waterline. Must be installed with proper bedding compound. Recommend a maximum torque setting of 20 lb/ft.

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Forespar Cf251 Marelon Full Threaded Mushroom Head Thru Hull W/Nut, White - 906018 - 108-906018F1

Forespar, Thru-Hulls & Seacocks
$51.53

Made from high strength glass-reinforced Marelon. Ideal for use above or below the waterline. Must be installed with proper bedding compound. Recommend a maximum torque setting of 20 lb/ft.

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Forespar Cf251 Marelon Full Threaded Mushroom Head Thru Hull W/Nut, White - 906016 - 108-906016F1

Forespar, Thru-Hulls & Seacocks
$40.15

Made from high strength glass-reinforced Marelon. Ideal for use above or below the waterline. Must be installed with proper bedding compound. Recommend a maximum torque setting of 20 lb/ft.

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Forespar Cf251 Marelon Full Threaded Mushroom Head Thru Hull W/Nut, White - 906014 - 108-906014F1

Forespar, Thru-Hulls & Seacocks
$34.33

Made from high strength glass-reinforced Marelon. Ideal for use above or below the waterline. Must be installed with proper bedding compound. Recommend a maximum torque setting of 20 lb/ft.

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Forespar Cf251 Marelon Full Threaded Mushroom Head Thru Hull W/Nut, White - 906012 - 108-906012F1

Forespar, Thru-Hulls & Seacocks
$30.04

Made from high strength glass-reinforced Marelon. Ideal for use above or below the waterline. Must be installed with proper bedding compound. Recommend a maximum torque setting of 20 lb/ft.

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Forespar Cf251 Marelon Full Threaded Mushroom Head Thru Hull W/Nut, White - 906010 - 108-906010F1

Forespar, Thru-Hulls & Seacocks
$28.68

Made from high strength glass-reinforced Marelon. Ideal for use above or below the waterline. Must be installed with proper bedding compound. Recommend a maximum torque setting of 20 lb/ft.

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Forespar Cf250S Marelon Full Threaded, Screened, Flush Head Thru Hull W/Nut, White - 906009 - 108-906009F1

Forespar, Thru-Hulls & Seacocks
$51.53

Made from high strength glass-reinforced Marelon. Ideal for use above or below the waterline. Must be installed with proper bedding compound. Recommend a maximum torque setting of 20 lb/ft. 250S Model is fitted with a screen.

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Forespar Cf250S Marelon Full Threaded, Screened, Flush Head Thru Hull W/Nut, White - 906003 - 108-906003F1

Forespar, Thru-Hulls & Seacocks
$33.89

Made from high strength glass-reinforced Marelon. Ideal for use above or below the waterline. Must be installed with proper bedding compound. Recommend a maximum torque setting of 20 lb/ft. 250S Model is fitted with a screen.

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Northern Marine Canada
Our products are shipped from Canada!
Parts Warehouse:
Toronto, Ontario, Canada
Head Office:
Kingston, Ontario

About Us

Northern Marine is a Canadian supplier of premium marine and RV parts and accessories from top industry brands. We focus on quality, accurate listings, and dependable fulfillment so you can maintain, repair, and outfit your boat or RV with confidence.

Our goal is simple: get you the right parts, shipped fast, with straightforward service you can count on.