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Premium Marine Quality Parts

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

Groco, Thru-Hulls & Seacocks
$46.41
Includes locknut.... More Details
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Groco Hth625 Bronze Hose Thru-Hull - Hth-625 - 34-Hth625F1

Groco, Thru-Hulls & Seacocks
$37.59
Includes locknut.... More Details
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Groco Hth500 Bronze Thru-Hull - Hth-500 - 34-Hth500F1

Groco, Thru-Hulls & Seacocks
$30.45
Includes locknut.... More Details
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Groco Hth2000 Bronze Thru-Hull - Hth-2000 - 34-Hth2000F1

Groco, Thru-Hulls & Seacocks
$132.09
Includes locknut.... More Details
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Groco Hth1500 Bronze Hose Thru-Hull - Hth-1500 - 34-Hth1500F1

Groco, Thru-Hulls & Seacocks
$101.49
Includes locknut.... More Details
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Groco Hth1250 Bronze Hose Thru-Hull - Hth-1250 - 34-Hth1250F1

Groco, Thru-Hulls & Seacocks
$84.17
Includes locknut.... More Details
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Groco Hth1125 Bronze Thru-Hull - Hth-1125 - 34-Hth1125F1

Groco, Thru-Hulls & Seacocks
$71.13
Includes locknut.... More Details
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Groco Hth1000 Bronze Hose Thru-Hull - Hth-1000 - 34-Hth1000F1

Groco, Thru-Hulls & Seacocks
$63.83
Includes locknut.... More Details
Includes locknut. Stainless Steel.... More Details
Includes locknut. Stainless Steel.... More Details
Includes locknut. Stainless Steel.... More Details
Includes locknut. Stainless Steel.... More Details
Includes locknut. Stainless Steel.... More Details
Includes locknut. Stainless Steel.... More Details
Includes locknut. Stainless Steel.... More Details
Includes locknut. Stainless Steel.... More Details
Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
For fuel or waterFull 3/4" flowAudible "click" at each handle positionFor thru panel mounting... More Details
For fuel or waterBottom port is common. Select between four outlets.Full 1/2" flowAudible "click" at each handle positionFor thru-panel mountingC83600 bronze constructionNOT TO BE USED IN POTABLE WATE... More Details
For fuel or waterFour Positions: Tank-1, Tank-2, Tanks 1 & 2, OffFull 1/2" flowAudible "click" at each handle positionFor thru panel mountingNOT TO BE USED IN POTABLE WATER SYSTEMS... More Details
For fuel or waterFour Positions: Tank-1, Tank-2, Tanks 1 & 2, OffFull 1" flowAudible "click" at each handle positionFor thru panel mountingNOT TO BE USED IN POTABLE WATER SYSTEMS... More Details
Includes locknut. Bronze.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Includes locknut. Bronze.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Includes locknut. Bronze.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FFC fittings are designed to accommodate the designed full pipe size flow and to provide an unres... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FFC fittings are designed to accommodate the designed full pipe size flow and to provide an unres... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FFC fittings are designed to accommodate the designed full pipe size flow and to provide an unres... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FFC fittings are designed to accommodate the designed full pipe size flow and to provide an unres... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FFC fittings are designed to accommodate the designed full pipe size flow and to provide an unres... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FFC fittings are designed to accommodate the designed full pipe size flow and to provide an unres... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FFC fittings are designed to accommodate the designed full pipe size flow and to provide an unres... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FF fittings are designed to accommodate the designed full pipe size flow and to provide an unrest... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FF fittings are designed to accommodate the designed full pipe size flow and to provide an unrest... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FF fittings are designed to accommodate the designed full pipe size flow and to provide an unrest... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FF fittings are designed to accommodate the designed full pipe size flow and to provide an unrest... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FF fittings are designed to accommodate the designed full pipe size flow and to provide an unrest... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FF fittings are designed to accommodate the designed full pipe size flow and to provide an unrest... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FF fittings are designed to accommodate the designed full pipe size flow and to provide an unrest... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FF fittings are designed to accommodate the designed full pipe size flow and to provide an unrest... More Details
Used for connecting hose to valve, seacocks, strainers or any hardware having female NPT pipe threads. FF fittings are designed to accommodate the designed full pipe size flow and to provide an unrest... 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
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
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
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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Groco Cv Bronze In-Line Check Valve - Cv-75 - 34-Cv75F1

Groco, Hoses, Clamps & Fittings
$50.69
In-line check valve may be used in water or fuel systems to keep pumps primed and to prevent back-flow in pressure systems. Unique design reduces flow turbulence and restriction, and improves pump per... More Details
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Groco Cv Bronze In-Line Check Valve - Cv-50 - 34-Cv50F1

Groco, Hoses, Clamps & Fittings
$42.49
In-line check valve may be used in water or fuel systems to keep pumps primed and to prevent back-flow in pressure systems. Unique design reduces flow turbulence and restriction, and improves pump per... More Details
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Groco Cv Bronze In-Line Check Valve - Cv-200 - 34-Cv200F1

Groco, Hoses, Clamps & Fittings
$285.19
In-line check valve may be used in water or fuel systems to keep pumps primed and to prevent back-flow in pressure systems. Unique design reduces flow turbulence and restriction, and improves pump per... More Details
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Groco Cv Bronze In-Line Check Valve - Cv-150 - 34-Cv150F1

Groco, Hoses, Clamps & Fittings
$191.79
In-line check valve may be used in water or fuel systems to keep pumps primed and to prevent back-flow in pressure systems. Unique design reduces flow turbulence and restriction, and improves pump per... More Details
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Groco Cv Bronze In-Line Check Valve - Cv-125 - 34-Cv125F1

Groco, Hoses, Clamps & Fittings
$125.99
In-line check valve may be used in water or fuel systems to keep pumps primed and to prevent back-flow in pressure systems. Unique design reduces flow turbulence and restriction, and improves pump per... More Details
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Groco Cv Bronze In-Line Check Valve - Cv-100 - 34-Cv100F1

Groco, Hoses, Clamps & Fittings
$67.29
In-line check valve may be used in water or fuel systems to keep pumps primed and to prevent back-flow in pressure systems. Unique design reduces flow turbulence and restriction, and improves pump per... More Details
Completely assembled and water tested salt water washdown system provides pressurized water on demand. For deck, anchor wash, or both. Features permanent magnet ball bearing motor, SPO-60-N vane pump,... More Details
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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... More Details
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... More Details
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... More Details
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... More Details
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... 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
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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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 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-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
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 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
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
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
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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
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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, 1-1/2" - Arg-1501-Pc - 34-Arg1501Pcf1

Groco, Thru-Hulls & Seacocks
$67.39
PC non-meatallic strainer cap.... 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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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.