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Premium Marine Quality Parts

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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.... More Details
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.... More Details
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.... More Details
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.... More Details
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 ... More Details
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
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
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
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
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
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
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
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
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
Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B... More Details
NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B... More Details
NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B... More Details
NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B... More Details
NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B... More Details
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 ada... More Details
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 ada... More Details
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.... More Details
Mount the ring permanently. Fasten the strainer to the ring and remove as often as needed. Uses 6 #10 fasteners.... More Details
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.... More Details
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.... More Details
Bronze. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Bronze. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Bronze. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
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 marin... More Details
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 marin... More Details
Bronze, 45°, standard flow.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Bronze, 45°, standard flow.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Bronze, 45°, standard flow.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Bronze, 45°, standard flow.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Bronze, 45°, standard flow.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Bronze, 45°, standard flow.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Bronze, 45°, standard flow.NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Standard Flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Standard Flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Standard Flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Standard Flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Standard Flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Standard Flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Standard Flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Standard Flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Standard Flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
Cast bronze. Straight, standard flow. NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
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Groco Pnc Bronze Check Valve - Pnc-750 - 34-Pnc750F1

Groco, Hoses, Clamps & Fittings
$28.49
Unique cast bronze pipe nipples feature an efficient internal check valve which imposes almost zero flow restriction and requires less than 1/2 PSI to open. Colored bands indicate flow direction (gree... More Details
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Groco Pnc Bronze Check Valve - Pnc-500 - 34-Pnc500F1

Groco, Hoses, Clamps & Fittings
$24.29
Unique cast bronze pipe nipples feature an efficient internal check valve which imposes almost zero flow restriction and requires less than 1/2 PSI to open. Colored bands indicate flow direction (gree... More Details
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Groco Pnc Bronze Check Valve - Pnc-2000 - 34-Pnc2000F1

Groco, Hoses, Clamps & Fittings
$98.67
Unique cast bronze pipe nipples feature an efficient internal check valve which imposes almost zero flow restriction and requires less than 1/2 PSI to open. Colored bands indicate flow direction (gree... More Details
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Groco Pnc Bronze Check Valve - Pnc-1500 - 34-Pnc1500F1

Groco, Hoses, Clamps & Fittings
$75.41
Unique cast bronze pipe nipples feature an efficient internal check valve which imposes almost zero flow restriction and requires less than 1/2 PSI to open. Colored bands indicate flow direction (gree... More Details
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Groco Pnc Bronze Check Valve - Pnc-1250 - 34-Pnc1250F1

Groco, Hoses, Clamps & Fittings
$62.39
Unique cast bronze pipe nipples feature an efficient internal check valve which imposes almost zero flow restriction and requires less than 1/2 PSI to open. Colored bands indicate flow direction (gree... More Details
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Groco Pnc Bronze Check Valve - Pnc-1000 - 34-Pnc1000F1

Groco, Hoses, Clamps & Fittings
$43.99
Unique cast bronze pipe nipples feature an efficient internal check valve which imposes almost zero flow restriction and requires less than 1/2 PSI to open. Colored bands indicate flow direction (gree... 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
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
Handle has square hole to accept standard ratchet helps you to reach hard-to-reach valves and eases actuation of hard to operate valves. Handle has thumb-release locking mechanism to ensure that the v... More Details
Handle has square hole to accept standard ratchet helps you to reach hard-to-reach valves and eases actuation of hard to operate valves. Handle has thumb-release locking mechanism to ensure that the v... More Details
Handle has square hole to accept standard ratchet helps you to reach hard-to-reach valves and eases actuation of hard to operate valves. Handle has thumb-release locking mechanism to ensure that the v... More Details
Handle has square hole to accept standard ratchet helps you to reach hard-to-reach valves and eases actuation of hard to operate valves. Handle has thumb-release locking mechanism to ensure that the v... More Details
Handle has square hole to accept standard ratchet helps you to reach hard-to-reach valves and eases actuation of hard to operate valves. Handle has thumb-release locking mechanism to ensure that the v... More Details
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 v... More Details
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 v... More Details
NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
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 v... More Details
NOT TO BE USED IN POTABLE WATER SYSTEMS.... More Details
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 v... More Details
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Groco Hvl750 Bronze Vented Loop For Hose - Hvl-750 - 34-Hvl750F1

Groco, Hoses, Clamps & Fittings
$398.69
HVL series vented loops are for hose connections. The oversized vent valve is virtually clog-free, and can easily be removed without tools for inspection or cleaning by unscrewing the threaded cap. Ca... More Details
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Groco Hvl1500 Bronze Vented Loop For Hose - Hvl-1500 - 34-Hvl1500F1

Groco, Hoses, Clamps & Fittings
$452.99
HVL series vented loops are for hose connections. The oversized vent valve is virtually clog-free, and can easily be removed without tools for inspection or cleaning by unscrewing the threaded cap. Ca... More Details
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Groco Hvl1000 Bronze Vented Loop For Hose - Hvl-1000 - 34-Hvl1000F1

Groco, Hoses, Clamps & Fittings
$397.29
HVL series vented loops are for hose connections. The oversized vent valve is virtually clog-free, and can easily be removed without tools for inspection or cleaning by unscrewing the threaded cap. Ca... 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.