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Packed and shipped within Canada!

Premium Marine Quality Parts

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1-1/2" Scoop Thru-Hull W/Nut - Sth-150-W - 34-Sth150Wf1

Groco, Thru-Hulls & Seacocks
$136.09
Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
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1-1/2" Thru-Hull With Nut - Th-150-W - 34-Th150Wf1

Groco, Thru-Hulls & Seacocks
$100.69
Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details
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 ratche... More Details
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... More Details
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1-1/4" Thru-Hull With Nut - Th-125-W - 34-Th125Wf1

Groco, Thru-Hulls & Seacocks
$77.99
Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details
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 ratche... More Details
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1" Scoop Thru-Hull W/Nut - Sth-100-W - 34-Sth100Wf1

Groco, Thru-Hulls & Seacocks
$85.09
Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
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1" Strainer 304 Ss Basket - Arg-1000-S Bspp - 34-Arg1000Sbsppf1

Groco, Thru-Hulls & Seacocks
$620.69
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... More Details
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1" Thru-Hull With Nut - Th-100-W - 34-Th100Wf1

Groco, Thru-Hulls & Seacocks
$46.79
Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details
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 ratche... More Details
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 ratche... More Details
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2" Strainer 304 Ss Basket - Arg-2000-S Bspp - 34-Arg2000Sbsppf1

Groco, Thru-Hulls & Seacocks
$1,057.69
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... More Details
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2" Thru-Hull With Nut - Th-200-W - 34-Th200Wf1

Groco, Thru-Hulls & Seacocks
$151.79
Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details
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 ratche... More Details
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3/4" Scoop Thru-Hull W/Nut - Sth-75-W - 34-Sth75Wf1

Groco, Thru-Hulls & Seacocks
$62.39
Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
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3/4" Thru-Hull With Nut - Th-75-W - 34-Th75Wf1

Groco, Thru-Hulls & Seacocks
$32.69
Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details
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Drain Wingnut W/ O-Ring, 8/01 & Newer - Arg-756 - 34-Arg756F1

Groco, Seals, Gaskets & Service Kits
$10.11
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Groco #304 Stainless Steel Filter Basket - Bs-1 - 34-Bs1F1

Groco, Filters, Oils & Lubricants
$95.89
Spare Basket... More Details
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Groco #304 Stainless Steel Filter Basket - Bs-11 - 34-Bs11F1

Groco, Filters, Oils & Lubricants
$147.29
Spare Basket... More Details
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Groco #304 Stainless Steel Filter Basket - Bs-16 - 34-Bs16F1

Groco, Filters, Oils & Lubricants
$132.99
Spare Basket... More Details
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Groco #304 Stainless Steel Filter Basket - Bs-19 - 34-Bs19F1

Groco, Filters, Oils & Lubricants
$149.49
Spare Basket... More Details
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Groco #304 Stainless Steel Filter Basket - Bs-2 - 34-Bs2F1

Groco, Filters, Oils & Lubricants
$101.49
Spare Basket... More Details
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Groco #304 Stainless Steel Filter Basket - Bs-4 - 34-Bs4F1

Groco, Filters, Oils & Lubricants
$104.29
Spare Basket... More Details
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Groco #304 Stainless Steel Filter Basket - Bs-5 - 34-Bs5F1

Groco, Filters, Oils & Lubricants
$115.99
Spare Basket... More Details
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Groco #304 Stainless Steel Filter Basket - Bs-6 - 34-Bs6F1

Groco, Filters, Oils & Lubricants
$130.19
Spare Basket... More Details
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Groco #304 Stainless Steel Filter Basket - Bs-8 - 34-Bs8F1

Groco, Filters, Oils & Lubricants
$138.79
Spare Basket... More Details
Spare Basket... More Details
Spare Basket... More Details
Spare Basket... More Details
Spare Basket... More Details
Spare Basket... More Details
Spare Basket... More Details
Spare Basket... More Details
Spare Basket... More Details
Spare Basket... More Details
Spare Basket... More Details
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Groco 2157 Buna-N O-Ring - 2-157 - 34-2157F1

Groco, Seals, Gaskets & Service Kits
$4.19
Replacement Buna-N O-Ring for ARG Strainers.... More Details
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Groco 2238 Cap O-Ring, For Arg-1500/3000 - 2-238 - 34-2238F1

Groco, Seals, Gaskets & Service Kits
$4.37
Cap O-Ring... More Details
Six-port fuel valves are used where 2 tanks supply a single engine, and a return to each supply tank is required. ABYC H33.9.2 states that fuel system valves must have an independent means of support.... More Details
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Groco 8Rset Replacement Sight Glass Gasket Set - #8R Set - 34-8Rsetf1

Groco, Seals, Gaskets & Service Kits
$27.39
Replacement sight glass gasket set... More Details
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 in... More Details
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Groco 9Rset Replacement Sight Glass Gasket Set - #9R Set - 34-9Rsetf1

Groco, Seals, Gaskets & Service Kits
$24.69
Replacement sight glass gasket set... More Details
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 ... More Details
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 ... More Details
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... More Details
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... More Details
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... More Details
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... More Details
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... More Details
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... More Details
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... More Details
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... More Details
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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.... More Details
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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.... More Details
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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.... More Details
Service kits for ARG strainers. Contain cap O-Ring, sight glass O-Ring, washer and drain wingnut gasket.... More Details
Service kits for ARG strainers. Contain cap O-Ring, sight glass O-Ring, washer and drain wingnut gasket.... More Details
Drain Wingnut with O-Ring, Pre- 8/01... More Details
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... More Details
For the ARG series strainers. Maximum psi is 50. Maximum temperature is 225° F. Sight glass includes drain wingnut.... More Details
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... More Details
For the ARG series strainers. Maximum psi is 50. Maximum temperature is 225° F. Sight glass includes drain wingnut.... More Details
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... More Details
For the ARG series strainers. Maximum psi is 50. Maximum temperature is 225° F. Sight glass includes drain wingnut.... More Details
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... More Details
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... More Details
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... More Details
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... More Details
For the ARG series strainers. Maximum psi is 50. Maximum temperature is 225° F. Sight glass includes drain wingnut.... More Details
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... More Details
For the ARG series strainers. Maximum psi is 50. Maximum temperature is 225° F. Sight glass includes drain wingnut.... More Details
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Groco As-100 Bilge Pump Switch - As-100 - 34-As100F1

Groco, Bilge Pumps & Blowers
$223.49
AS-100 uses the simple and reliable pressure fluctuation from a rising or falling bilge water level to turn your bilge pump on and off automatically. No floats to stick or fill with water. Approximate... More Details
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 #1... More Details
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 #1... More Details
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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 ba... More Details
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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 ba... More Details
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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 ba... More Details
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Groco Bm11 Monel Filter Basket - Bm-11 - 34-Bm11F1

Groco, Filters, Oils & Lubricants
$559.29
Spare Basket... More Details
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Groco Bm2 Monel Filter Basket - Bm-2 - 34-Bm2F1

Groco, Filters, Oils & Lubricants
$232.99
Spare Basket... More Details
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Groco Bm3 Monel Filter Basket - Bm-3 - 34-Bm3F1

Groco, Filters, Oils & Lubricants
$283.69
Spare Basket... More Details
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Groco Bm5 Monel Filter Basket - Bm-5 - 34-Bm5F1

Groco, Filters, Oils & Lubricants
$361.69
Spare Basket... More Details
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 replacin... More Details
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 replacin... More Details
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 replacin... More Details
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 replacin... More Details
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 replacin... More Details
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 replacin... More Details
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 replacin... More Details
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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.