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Premium Marine Quality Parts

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Marine Hardware Thhss114 Stainless Steel Thru-Hull For Hose, 1-1/4" - Thmb1.250-S - 369-Thhss114F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$99.19

SS Thru-hull fitting.

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Marine Hardware Thhss112 Stainless Steel Thru-Hull For Hose, 1-1/2" - Thmb1.500-S - 369-Thhss112F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$113.49

SS Thru-hull fitting.

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Marine Hardware Thhss1 Stainless Steel Thru-Hull For Hose, 1" - Thmb1.000-S - 369-Thhss1F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$86.99

SS Thru-hull fitting.

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Marine Hardware Thh34 Chrome/Bronze Thru-Hull For Hose, 3/4" - Thmb0.750-B - 369-Thh34F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$48.89

Marine Hardware's barbed thru-hull fitting are designed for use above the waterline, attached directly to hose. The bodies have straight thread below the barbed section. All have heavy wall construction for strength and wrench flats on the end of the threaded portion for easy, one-person installation.

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Marine Hardware Thh114 Chrome/Bronze Thru-Hull For Hose, 1-1/4" - Thmb1.250-B - 369-Thh114F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$109.59

Marine Hardware's barbed thru-hull fitting are designed for use above the waterline, attached directly to hose. The bodies have straight thread below the barbed section. All have heavy wall construction for strength and wrench flats on the end of the threaded portion for easy, one-person installation.

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Marine Hardware Thh112 Chrome/Bronze Thru-Hull For Hose, 1-1/2" - Thmb1.500-B - 369-Thh112F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$138.59

Marine Hardware's barbed thru-hull fitting are designed for use above the waterline, attached directly to hose. The bodies have straight thread below the barbed section. All have heavy wall construction for strength and wrench flats on the end of the threaded portion for easy, one-person installation.

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Marine Hardware Thh1 Chrome/Bronze Thru-Hull For Hose, 1" - Thmb1.000-B - 369-Thh1F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$86.69

Marine Hardware's barbed thru-hull fitting are designed for use above the waterline, attached directly to hose. The bodies have straight thread below the barbed section. All have heavy wall construction for strength and wrench flats on the end of the threaded portion for easy, one-person installation.

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Marine Hardware Sth34 High Speed Pick Up W/Thru Hull, 3/4" - Hswp0.750-Bn - 369-Sth34F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$85.79

Bronze.

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Marine Hardware Sth2 High Speed Pick Up W/Thru Hull, 2" - Hswp2.000-Bn - 369-Sth2F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$316.79

Bronze.

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Marine Hardware Sth12 High Speed Pick Up W/Thru Hull, 1/2" - Hswp.500-B - 369-Sth12F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$63.49

Bronze.

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Marine Hardware Sth114 High Speed Pick Up W/Thru Hull, 1-1/4" - Hswp1.250-Bn - 369-Sth114F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$151.79

Bronze.

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Marine Hardware Sth112 High Speed Pick Up W/Thru Hull, 1-1/2" - Hswp1.500-Bn - 369-Sth112F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$187.49

Bronze.

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Marine Hardware Sth1 High Speed Pick Up W/Thru Hull, 1" - Hswp1.000-Bm - 369-Sth1F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$105.59

Bronze.

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Marine Hardware Stainless Clad Thru-Hull Fitting, 3/4" - Thmb0.750-N - 369-Thmb0750Nf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$18.69

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Nylon body is gray in color to match stainless flange. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad Thru-Hull Fitting, 2" - Thmb2.000-N - 369-Thmb2000Nf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$35.79

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Nylon body is gray in color to match stainless flange. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad Thru-Hull Fitting, 1/2" - Thmb0.500-N - 369-Thmb0500Nf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$17.29

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Nylon body is gray in color to match stainless flange. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad Thru-Hull Fitting, 1" - Thmb1.000-N - 369-Thmb1000Nf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$19.79

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Nylon body is gray in color to match stainless flange. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad Thru-Hull Fitting, 1-1/8" - Thmb1.125-N - 369-Thmb1125Nf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$19.79

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Nylon body is gray in color to match stainless flange. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad Thru-Hull Fitting, 1-1/4" - Thmb1.250-N - 369-Thmb1250Nf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$22.49

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Nylon body is gray in color to match stainless flange. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad Thru-Hull Fitting, 1-1/2" - Thmb1.500-N - 369-Thmb1500Nf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$26.39

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Nylon body is gray in color to match stainless flange. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad 90° Thru-Hull Fitting, 5/8" - Thmb90-0.625-Nb - 369-Thmb900625Nbf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$21.29

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad 90° Thru-Hull Fitting, 3/4" - Thmb90-0.750-Nyb - 369-Thmb900750Nbf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$21.09

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad 90° Thru-Hull Fitting, 1" - Thmb90-1.000-Nyb - 369-Thmb901000Nbf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$21.29

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad 90° Thru-Hull Fitting, 1-1/8" - Thmb90-1.125-Nyb - 369-Thmb901125Nbf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$22.59

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad 90° Thru-Hull Fitting, 1-1/4" - Thmb90-1.250-Nb - 369-Thmb901250Nbf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$28.99

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Stainless Clad 90° Thru-Hull Fitting, 1-1/2" - Thmb90-1.500-Nyb - 369-Thmb901500Nbf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$28.99

A tough glass filled nylon body is molded around an attractive stainless flange. Get the look and feel of stainless thru-hulls at a fraction of the price. Flange sizes are uniform for multi-outlet applications.

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Marine Hardware Seasum2000Sm Universal Swivel Mount Sea Strainer, 2" - Seasum2.000-Sm - 369-Seasum2000Smf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$1,036.49

Marine Hardware, Inc.'s Universal Mount Sea Strainers incorporate all the best features. Starting with a cast bronze housing, all units include a pull out strainer screen assembly for easy spill-proof maintenance. The inspection lens is heavy walled for maximum strength and is securely fastened to the housing with a bronze retainer ring plate. Our unique design insures a firm mount to the engine stringers and allows full 360? rotation of the top housing to optimize plumbing fittings. A perfect choice for port and starboard engine installations.

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Marine Hardware Seasum1250 Universal Swivel Mount Sea Strainer, 1-1/4" - Seasum1.250 - 369-Seasum1250F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$825.19

Marine Hardware, Inc.'s Universal Mount Sea Strainers incorporate all the best features. Starting with a cast bronze housing, all units include a pull out strainer screen assembly for easy spill-proof maintenance. The inspection lens is heavy walled for maximum strength and is securely fastened to the housing with a bronze retainer ring plate. Our unique design insures a firm mount to the engine stringers and allows full 360? rotation of the top housing to optimize plumbing fittings. A perfect choice for port and starboard engine installations.

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Marine Hardware Seasum1000 Universal Swivel Mount Sea Strainer, 1" - Seasum1.000 - 369-Seasum1000F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$444.89

Marine Hardware, Inc.'s Universal Mount Sea Strainers incorporate all the best features. Starting with a cast bronze housing, all units include a pull out strainer screen assembly for easy spill-proof maintenance. The inspection lens is heavy walled for maximum strength and is securely fastened to the housing with a bronze retainer ring plate. Our unique design insures a firm mount to the engine stringers and allows full 360? rotation of the top housing to optimize plumbing fittings. A perfect choice for port and starboard engine installations.

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Marine Hardware Seasum0750 Universal Swivel Mount Sea Strainer, 3/4" - Seasum0.750 - 369-Seasum0750F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$427.79

Marine Hardware, Inc.'s Universal Mount Sea Strainers incorporate all the best features. Starting with a cast bronze housing, all units include a pull out strainer screen assembly for easy spill-proof maintenance. The inspection lens is heavy walled for maximum strength and is securely fastened to the housing with a bronze retainer ring plate. Our unique design insures a firm mount to the engine stringers and allows full 360? rotation of the top housing to optimize plumbing fittings. A perfect choice for port and starboard engine installations.

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Marine Hardware Seasum01500 Universal Swivel Mount Sea Strainer, 1-1/2" - Seasum1.500 - 369-Seasum1500F1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$878.39

Marine Hardware, Inc.'s Universal Mount Sea Strainers incorporate all the best features. Starting with a cast bronze housing, all units include a pull out strainer screen assembly for easy spill-proof maintenance. The inspection lens is heavy walled for maximum strength and is securely fastened to the housing with a bronze retainer ring plate. Our unique design insures a firm mount to the engine stringers and allows full 360? rotation of the top housing to optimize plumbing fittings. A perfect choice for port and starboard engine installations.

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Marine Hardware Seasmpnptdome Multi-Port Sea Strainer - Seasmp-Npt-Dome - 369-Seasmpnptdomef1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$572.79

This compact assembly has proven efficient and reliable for years in the field in many types of craft, from ski boats to sport fisher to cruisers. Cast in bronze, the multi-port strainers are precision machined, and assembled with the finest hardware available. The clear heavy duty lens allows easy inspection and a hand knob facilitates clean out with no need for tools. A plug simplifies drainage for winterization. These units come standard with barbs for 1-1/4" diameter inlet hose, but can be tapped to accept 1" pipe fittings and elbows, if required for your specific installation. The outlet side is tapped for two 3/4" NPT and one 1" NPT.

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Marine Hardware Bronze Tri-Angle Seacock, 3/4" Pipe - Seac0.750-B - 369-Seac0750Bf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$217.79

Same precision specifications as Marine Hardware ball valves. Triangular flange machined smooth for flush-fit hull mounting. Includes ground screw, mounting boss and drain. Cathodic protection required.

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Marine Hardware Bronze Tri-Angle Seacock, 2" Pipe - Seac2.000-B - 369-Seac2000Bf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$873.39

Same precision specifications as Marine Hardware ball valves. Triangular flange machined smooth for flush-fit hull mounting. Includes ground screw, mounting boss and drain. Cathodic protection required.

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Marine Hardware Bronze Tri-Angle Seacock, 1" Pipe - Seac1.000-B - 369-Seac1000Bf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$339.89

Same precision specifications as Marine Hardware ball valves. Triangular flange machined smooth for flush-fit hull mounting. Includes ground screw, mounting boss and drain. Cathodic protection required.

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Marine Hardware Bronze Tri-Angle Seacock, 1-1/4" Pipe - Seac1.250-B - 369-Seac1250Bf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$378.19

Same precision specifications as Marine Hardware ball valves. Triangular flange machined smooth for flush-fit hull mounting. Includes ground screw, mounting boss and drain. Cathodic protection required.

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Marine Hardware Bronze Tri-Angle Seacock, 1-1/2" Pipe - Seac1.500-B - 369-Seac1500Bf1

Marine Hardware Inc (Canada Only), Thru-Hulls & Seacocks
$651.89

Same precision specifications as Marine Hardware ball valves. Triangular flange machined smooth for flush-fit hull mounting. Includes ground screw, mounting boss and drain. Cathodic protection required.

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Johnson Pump 90331 Aerator Head - Overall Length 12-3/4", 3/4" Thru-Hull, One Shut Off Valve - 90331 - 189-90331F1

Johnson Pump/Mayfair, Thru-Hulls & Seacocks
$75.49

Johnson Pump 90331 Aerator Head - Overall Length 12-3/4", 3/4" Thru-Hull, One Shut Off Valve.

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Johnson Pump 90191 Aerator Head - Overall Length 13-3/4" Thru-Hull, One Shut Off Valve - 90191-00 - 189-9019100F1

Johnson Pump/Mayfair, Thru-Hulls & Seacocks
$59.49

Johnson Pump 90191 Aerator Head - Overall Length 13-3/4" Thru-Hull, One Shut Off Valve.

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Johnson Pump 75035 3/4" 90° White Thru-Hull - 75035-00 - 189-7503500F1

Johnson Pump/Mayfair, Thru-Hulls & Seacocks
$27.79

Fittings are molded of tough acetal resin so they will not rust, corrode, discolor nor are they susceptible to electrolysis. White. Skin pack.

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Johnson Pump 54236Pk 90° Aerator Thru-Hull Assembly - 54236Pk - 189-54236Pkf1

Johnson Pump/Mayfair, Thru-Hulls & Seacocks
$28.49

Replacement 90° Aerator Thru-hull Assembly

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Johnson Pump 54234Pk Straight Aerator Thru-Hull Assembly - 54234Pk - 189-54234Pkf1

Johnson Pump/Mayfair, Thru-Hulls & Seacocks
$23.99

Replacement Straight Aerator Thru-hull

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Johnson Pump 54033Pk Thru-Hull Nut - 54033Pk - 189-54033Pkf1

Johnson Pump/Mayfair, Thru-Hulls & Seacocks
$17.89

Replacement Thru-Hull Nut

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Johnson Pump 092465302Cn Pumprotector™ Inlet Strainer - 09-24653-02-Cn - 189-092465302Cnf1

Johnson Pump/Mayfair, Thru-Hulls & Seacocks
$66.39

Strainer features a transparent cover for simple inspection, a wide variety of KlickTite™ port connectors for simple installation and removal, and high quality materials for simple maintenance. The connectors make it possible to remove the entire unit for thorough cleaning. Stainless steel mesh screen.Connectors: KlickTite 1 x 1/2" hose / 3/8" NPT, 1 x 3/4" hose / 1/2" NPT

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Johnson Pump 092465202Cn Pumprotector™ Inline Inlet Strainer - 09-24652-02-Cn - 189-092465202Cnf1

Johnson Pump/Mayfair, Thru-Hulls & Seacocks
$50.29

Strainer features a transparent cover for simple inspection, a wide variety of KlickTite™ port connectors for simple installation and removal, and high quality materials for simple maintenance. The connectors make it possible to remove the entire unit for thorough cleaning. Stainless steel mesh screen.Connectors: 2 x 1/2" hose / 3/8" NPT, 1 x 3/4" hose / 1/2" NPT

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Jabsco Pumpgard In-Line Strainer - 36400-1000 - 6-364001000F1

Jabsco, Thru-Hulls & Seacocks
$64.39

Prevents dirt and other particles from entering pump intake. Cuts down on repairs. Transparent housing for quick inspection, 50 mesh stainless steel filtering screen.

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Jabsco Pumpgard In-Line Strainer - 36200-1000 - 6-362001000F1

Jabsco, Thru-Hulls & Seacocks
$61.79

Prevents dirt and other particles from entering pump intake. Cuts down on repairs. Transparent housing for quick inspection, 50 mesh stainless steel filtering screen.

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Jabsco 464000711 Strainer Only For 6 Gpm - 46400-0711 - 6-464000711F1

Jabsco, Thru-Hulls & Seacocks
$75.59

Strainer Only for 6 GPM

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Jabsco 464000002 Pumpguard Fine Mesh In Line Strainer, 1/2" Hose Barb In/Out, Straight - 46400-0002 - 6-464000002F1

Jabsco, Thru-Hulls & Seacocks
$61.59

This compact pre filter prevents particles jamming valves and causing pump breakdowns - we've given it a screw off, transparent housing for easy inspection and quick, in place cleaning.

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Jabsco 462000000 Pumpguard Coarse Mesh In Line Strainer, 3/4" Hose Barb In/Out, Straight - 46200-0000 - 6-462000000F1

Jabsco, Thru-Hulls & Seacocks
$66.79

This compact pre filter prevents particles jamming valves and causing pump breakdowns - we've given it a screw off, transparent housing for easy inspection and quick, in place cleaning.

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In-Line Strainer, 1/2" Hose - 36400-0000 - 6-364000000F1

Jabsco, Thru-Hulls & Seacocks
$64.39

Prevents dirt and other particles from entering pump intake. Cuts down on repairs. Transparent housing for quick inspection, 50 mesh stainless steel filtering screen.

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I50 Tridata W/Thru-Hull Trans - T70582 - 152-T70582F1

Raymarine, Thru-Hulls & Seacocks
$1,371.49
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I50 Speed Pk W/Retrc Thru-Hull - T70583 - 152-T70583F1

Raymarine, Thru-Hulls & Seacocks
$914.29
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Groco Thxl750Ws Stainless Steel Extra Long Thru-Hull Fittings, 3/4" - Thxl-750-Ws - 34-Thxl750Wsf1

Groco, Thru-Hulls & Seacocks
$83.79

Extra long NPSM / NPT combination thread#316 Stainless Steel

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Groco Thxl2000Ws Stainless Steel Extra Long Thru-Hull Fittings, 2" - Thxl-2000-Ws - 34-Thxl2000Wsf1

Groco, Thru-Hulls & Seacocks
$121.99

Extra long NPSM / NPT combination thread#316 Stainless Steel

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Groco Thxl1500Ws Stainless Steel Extra Long Thru-Hull Fittings, 1-1/2" - Thxl-1500-Ws - 34-Thxl1500Wsf1

Groco, Thru-Hulls & Seacocks
$112.19

Extra long NPSM / NPT combination thread#316 Stainless Steel

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Groco Thxl1250Ws Stainless Steel Extra Long Thru-Hull Fittings, 1-1/4" - Thxl-1250-Ws - 34-Thxl1250Wsf1

Groco, Thru-Hulls & Seacocks
$110.79

Extra long NPSM / NPT combination thread#316 Stainless Steel

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Groco Thxl1000Ws Stainless Steel Extra Long Thru-Hull Fittings, 1" - Thxl-1000-Ws - 34-Thxl1000Wsf1

Groco, Thru-Hulls & Seacocks
$90.79

Extra long NPSM / NPT combination thread#316 Stainless Steel

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Groco Thxl Bronze Extra-Length Thru-Hull With Nut, Nps Thread - Thxl-750-W - 34-Thxl750Wf1

Groco, Thru-Hulls & Seacocks
$60.70

Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut included.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Thxl Bronze Extra-Length Thru-Hull With Nut, Nps Thread - Thxl-2000-W - 34-Thxl2000Wf1

Groco, Thru-Hulls & Seacocks
$175.79

Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut included.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Thxl Bronze Extra-Length Thru-Hull With Nut, Nps Thread - Thxl-1500-W - 34-Thxl1500Wf1

Groco, Thru-Hulls & Seacocks
$133.10

Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut included.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Thxl Bronze Extra-Length Thru-Hull With Nut, Nps Thread - Thxl-1250-W - 34-Thxl1250Wf1

Groco, Thru-Hulls & Seacocks
$124.23

Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut included.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Thxl Bronze Extra-Length Thru-Hull With Nut, Nps Thread - Thxl-1000-W - 34-Thxl1000Wf1

Groco, Thru-Hulls & Seacocks
$76.98

Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut included.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Tht530 Thru Hull Installation Tool , Sizes 1/2" Through 3" - Tht-530 - 34-Tht530F1

Groco, Thru-Hulls & Seacocks
$304.59

Enables Installations GROCO thru-hull fittings by a single installer. Slide the thru-hull fitting, flanged end first, over the tool. (It will stop at the proper step.) Tie a length of monofilament to the eye and place it into the already-cut hole in the hull of the boat. Apply caulking to the flange of the fitting, and pull the fitting through the hole and against the hull from inside the boat. Thread the mono-filament through the locknut or seacock. With the fitting pulled firmly against the hull the locknut or the seacock may be screwed onto the fitting.

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Groco Th Bronze Standard Length Thru-Hull With Nut, Nps Thread - Th-750-W - 34-Th750Wf1

Groco, Thru-Hulls & Seacocks
$34.10

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. Includes nut.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Th Bronze Standard Length Thru-Hull With Nut, Nps Thread - Th-500-W - 34-Th500Wf1

Groco, Thru-Hulls & Seacocks
$31.08

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. Includes nut.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Th Bronze Standard Length Thru-Hull With Nut, Nps Thread - Th-4000-W - 34-Th4000Wf1

Groco, Thru-Hulls & Seacocks
$1,662.79

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. Includes nut.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Th Bronze Standard Length Thru-Hull With Nut, Nps Thread - Th-3000-W - 34-Th3000Wf1

Groco, Thru-Hulls & Seacocks
$462.95

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. Includes nut.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Th Bronze Standard Length Thru-Hull With Nut, Nps Thread - Th-2500-W - 34-Th2500Wf1

Groco, Thru-Hulls & Seacocks
$322.43

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. Includes nut.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Th Bronze Standard Length Thru-Hull With Nut, Nps Thread - Th-2000-W - 34-Th2000Wf1

Groco, Thru-Hulls & Seacocks
$158.34

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. Includes nut.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Th Bronze Standard Length Thru-Hull With Nut, Nps Thread - Th-1500-W - 34-Th1500Wf1

Groco, Thru-Hulls & Seacocks
$105.04

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. Includes nut.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Th Bronze Standard Length Thru-Hull With Nut, Nps Thread - Th-1250-W - 34-Th1250Wf1

Groco, Thru-Hulls & Seacocks
$81.36

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. Includes nut.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Th Bronze Standard Length Thru-Hull With Nut, Nps Thread - Th-1000-W - 34-Th1000Wf1

Groco, Thru-Hulls & Seacocks
$48.81

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. Includes nut.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sth Bronze Scoop Thru-Hull With Nut - Sth-750-W - 34-Sth750Wf1

Groco, Thru-Hulls & Seacocks
$65.08

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sth Bronze Scoop Thru-Hull With Nut - Sth-500-W - 34-Sth500Wf1

Groco, Thru-Hulls & Seacocks
$51.83

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sth Bronze Scoop Thru-Hull With Nut - Sth-2500-W - 34-Sth2500Wf1

Groco, Thru-Hulls & Seacocks
$357.19

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sth Bronze Scoop Thru-Hull With Nut - Sth-2000-W - 34-Sth2000Wf1

Groco, Thru-Hulls & Seacocks
$245.45

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sth Bronze Scoop Thru-Hull With Nut - Sth-1500-W - 34-Sth1500Wf1

Groco, Thru-Hulls & Seacocks
$141.96

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sth Bronze Scoop Thru-Hull With Nut - Sth-1250-W - 34-Sth1250Wf1

Groco, Thru-Hulls & Seacocks
$127.26

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sth Bronze Scoop Thru-Hull With Nut - Sth-1000-W - 34-Sth1000Wf1

Groco, Thru-Hulls & Seacocks
$88.76

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Stainless Steel Thru-Hull Fitting, 3/4" - Th-750-Ws - 34-Th750Wsf1

Groco, Thru-Hulls & Seacocks
$29.79

NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B

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Groco Stainless Steel Thru-Hull Fitting, 1/2" - Th-500-Ws - 34-Th500Wsf1

Groco, Thru-Hulls & Seacocks
$31.29

NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B

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Groco Stainless Steel Thru-Hull Fitting, 1" - Th-1000-Ws - 34-Th1000Wsf1

Groco, Thru-Hulls & Seacocks
$85.09

NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B

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Groco Stainless Steel Thru-Hull Fitting, 1-1/4" - Th-1250-Ws - 34-Th1250Wsf1

Groco, Thru-Hulls & Seacocks
$94.99

NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B

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Groco Stainless Steel Thru-Hull Fitting, 1-1/2" - Th-1500-Ws - 34-Th1500Wsf1

Groco, Thru-Hulls & Seacocks
$99.39

NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B

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Groco Ssc Bronze Engine Flush Kit And Safety Seacock Conversion - Ssc-2000 - 34-Ssc2000F1

Groco, Thru-Hulls & Seacocks
$408.29

Allows instant emergency bilge pumping, or to simplify winterization and cooling system flushing. While the engine is running, close the seacock and remove the quick release plug. Includes service adaptor.

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Groco Ssc Bronze Engine Flush Kit And Safety Seacock Conversion - Ssc-1250 - 34-Ssc1250F1

Groco, Thru-Hulls & Seacocks
$305.59

Allows instant emergency bilge pumping, or to simplify winterization and cooling system flushing. While the engine is running, close the seacock and remove the quick release plug. Includes service adaptor.

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Groco Sc2500 Bronze Slotted Strainer With Mount Ring - Sc-2500 - 34-Sc2500F1

Groco, Thru-Hulls & Seacocks
$235.74

Mount the ring permanently. Fasten the strainer to the ring and remove as often as needed. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sc1500Al Aluminum Slotted Strainer With Mount Ring - Sc1500Al - 34-Sc1500Alf1

Groco, Thru-Hulls & Seacocks
$243.89

Mount the ring permanently. Fasten the strainer to the ring and remove as often as needed. Uses 6 #10 fasteners.

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Groco Sc1500 Bronze Slotted Strainer With Mount Ring - Sc-1500 - 34-Sc1500F1

Groco, Thru-Hulls & Seacocks
$188.69

Mount the ring permanently. Fasten the strainer to the ring and remove as often as needed. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sc1000 Bronze Slotted Strainer With Mount Ring - Sc-1000 - 34-Sc1000F1

Groco, Thru-Hulls & Seacocks
$88.66

Mount the ring permanently. Fasten the strainer to the ring and remove as often as needed. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sc Bronze Slotted Strainer Without Mount Ring - Sc-2500-L - 34-Sc2500Lf1

Groco, Thru-Hulls & Seacocks
$161.79

Bronze. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sc Bronze Slotted Strainer Without Mount Ring - Sc-1500-L - 34-Sc1500Lf1

Groco, Thru-Hulls & Seacocks
$89.19

Bronze. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Sc Bronze Slotted Strainer Without Mount Ring - Sc-1000-L - 34-Sc1000Lf1

Groco, Thru-Hulls & Seacocks
$52.09

Bronze. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Rsc Bronze Round Hull Strainer With Access - Rsc-2000 - 34-Rsc2000F1

Groco, Thru-Hulls & Seacocks
$176.79

Bronze. With mounting ring. Easy access to the thru-hull fitting and seacock beneath Groco hull strainer with patented access door design. No need to remove the entire strainer to clear nuisance marine growth. NOT TO BE USED IN POTABLE WATER SYSTEMS.

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Groco Rsc Bronze Round Hull Strainer With Access - Rsc-1000 - 34-Rsc1000F1

Groco, Thru-Hulls & Seacocks
$115.19

Bronze. With mounting ring. Easy access to the thru-hull fitting and seacock beneath Groco hull strainer with patented access door design. No need to remove the entire strainer to clear nuisance marine growth. 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-750 - 34-Ibvf750F1

Groco, Thru-Hulls & Seacocks
$90.33

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.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-2500 - 34-Ibvf2500F1

Groco, Thru-Hulls & Seacocks
$303.49

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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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.