Seacocks & Thru-Hulls
Marine Plumbing
Seacocks, Thru-Hulls, Strainers & Below-Waterline Fittings
Shop marine seacocks, thru-hull fittings, raw-water strainers, valves, guards, fittings, and installation supplies for intake, discharge, drainage, and cooling systems.
Below-Waterline Parts Need Careful Matching
Confirm hose inside diameter, thread type, material compatibility, bonding requirements, valve access, and whether the fitting is above or below the waterline. When in doubt, match the existing fitting and ask for help before replacing critical hull plumbing.
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Sea-Dog 5208501 Dripper Guard® Pro, A= 1-7/8" B= 1", C= 1-15/16", Black, Weight= 0.2
Attaches directly to your thru-hull for quick and easy installation Protects boat from unsightly stains Composed of a soft and durable rubber comp...
View full detailsSea-Dog 5208491 Dripper Guard® Adhesive Stain Guard, Up To 2-5/8", Qty: 3 weight .06, Black
Stops black streaks from staining the side of your boat. Easy do-it yourself installation, simple prep-peel backing and press along the bottom edge...
View full detailsSea-Dog 5208481 Dripper Guard® Adhesive Stain Guard, Up To 2-5/8", Qty: 3 weight .06, White
Stops black streaks from staining the side of your boat. Easy do-it yourself installation, simple prep-peel backing and press along the bottom edge...
View full detailsSea-Dog 5208471 Dripper Guard® Adhesive Stain Guard, Up To 1-7/8" , Qty: 3 weight .06, Black
Stops black streaks from staining the side of your boat. Easy do-it yourself installation, simple prep-peel backing and press along the bottom edge...
View full detailsSea-Dog 5208461 Dripper Guard® Adhesive Stain Guard, Up To 1-7/8", Qty: 3 weight .02, White
Stops black streaks from staining the side of your boat. Easy do-it yourself installation, simple prep-peel backing and press along the bottom edge...
View full detailsSea-Dog 5208431 Dripper Guard® Adhesive Stain Guard, Up To 2-5/8" , Qty: 1 weight .02, Black
Stops black streaks from staining the side of your boat. Easy do-it yourself installation, simple prep-peel backing and press along the bottom edge...
View full detailsSea-Dog 5208421 Dripper Guard® Adhesive Stain Guard, Up To 2-5/8" , Qty: 1 weight .02, White
Stops black streaks from staining the side of your boat. Easy do-it yourself installation, simple prep-peel backing and press along the bottom edge...
View full detailsSea-Dog 5208411 Dripper Guard® Adhesive Stain Guard, Up To 1-7/8" , Qty: 1 weight .02, Black
Stops black streaks from staining the side of your boat. Easy do-it yourself installation, simple prep-peel backing and press along the bottom edge...
View full detailsSea-Dog 5208401 Dripper Guard® Adhesive Stain Guard, Up To 1-7/8" , Qty: 1 weight .02, White
Stops black streaks from staining the side of your boat. Easy do-it yourself installation, simple prep-peel backing and press along the bottom edge...
View full detailsSea-Dog 520835 90° Thru-Hull With Stainless Cap, A:2-3/8", B: 1-1/8", 1-13/16" ,D: 4-5/16", E: 1-9/16" ,F: 1-1/2", Stainless
Feature Polypropylene bodies with 304 stainless caps. Designed to allow water to pass in or out of a vessel. For use with hose for drainage above t...
View full detailsSea-Dog 520833 90° Thru-Hull With Stainless Cap, A: 1-7/8", B: 7/8", C:1-13/16",D: 3-3/4", E: 1-15/16", F: 1-1/8", Stainless
Feature Polypropylene bodies with 304 stainless caps. Designed to allow water to pass in or out of a vessel. For use with hose for drainage above t...
View full detailsSea-Dog 520832 90° Thru-Hull With Stainless Cap, A: 1-7/8", B: 7/8", C: 1-13/16", D: 3-3/4", E: 1-15/16", F:1" , Stainless
Feature Polypropylene bodies with 304 stainless caps. Designed to allow water to pass in or out of a vessel. For use with hose for drainage above t...
View full detailsSea-Dog 520831 90° Thru-Hull With Stainless Cap, A: 1-7/8", B: 7/8", C: 1-13/16"D: 3-7/16", E: 1-15/16", F: 3/4” , Stainless
Feature Polypropylene bodies with 304 stainless caps. Designed to allow water to pass in or out of a vessel. For use with hose for drainage above t...
View full detailsSea-Dog 520830 90° Thru-Hull With Stainless Cap, A: 1-7/8", B: 7/8", C: 1-13/16", D: 3-7/16", E: 1-15/16", F:5/8" , Stainless
Feature Polypropylene bodies with 304 stainless caps. Designed to allow water to pass in or out of a vessel. For use with hose for drainage above t...
View full detailsSea-Dog 520825 Thru Hull with Stainless Cap, A:2-3/8", B: 1-1/8”, C: 1-7/8" ,D: 4", E: 1-9/16" ,F: 1-1/2", Stainless
Thru-Hulls feature Polypropylene bodies with 304 stainless caps. Designed to allow water to pass in or out of a vessel. For use with hose for drain...
View full detailsSea-Dog 520823 Thru Hull with Stainless Cap, A: 1-7/8", B: 7/8”, C: 1-3/4",D: 3-3/8", E: 1-3/16”, F: 1-1/8", Stainless
Thru-Hulls feature Polypropylene bodies with 304 stainless caps. Designed to allow water to pass in or out of a vessel. For use with hose for drain...
View full detailsSea-Dog 520822 Thru Hull with Stainless Cap, A: 1-7/8", B: 7/8", C: 1-3/4”, D: 3-3/8”, E: 1-3/16”, F:1" , Stainless
Thru-Hulls feature Polypropylene bodies with 304 stainless caps. Designed to allow water to pass in or out of a vessel. For use with hose for drain...
View full detailsSea-Dog 520821 Thru Hull with Stainless Cap, A: 1-7/8", B: 7/8”, C: 1-3/4”, D: 3-3/8”, E: 1-3/16", F: 3/4”, Stainless
Thru-Hulls feature Polypropylene bodies with 304 stainless caps. Designed to allow water to pass in or out of a vessel. For use with hose for drain...
View full detailsSea-Dog 520820 Thru Hull with Stainless Cap, A: 1-7/8", B: 7/8”, C: 1-3/4”, D: 3-3/8", E: 1-3/16" ,F:5/8" , Stainless
Thru-Hulls feature Polypropylene bodies with 304 stainless caps. Designed to allow water to pass in or out of a vessel. For use with hose for drain...
View full detailsGroco THT530 Thru Hull Installation Tool , Sizes 1/2" through 3"
Enables Installations GROCO thru-hull fittings by a single installer. Slide the thru-hull fitting, flanged end first, over the tool. (It will stop ...
View full details2" Bronze Seacock Body
Ball valve design. Cast bronze. Meets needs of applications that require long, scoop or flush type thru-hulls. NOT TO BE USED IN POTABLE WATER SYST...
View full details1-1/2" Bronze Seacock Body
Ball valve design. Cast bronze. Meets needs of applications that require long, scoop or flush type thru-hulls.
1-1/2" Intake Water Strainer
Cast bronze. Designed for easy installation and cleaning. Features mounting lugs cast into both sides to assure universal mounting, four outside ti...
View full details3/4" Scoop Thru Hull w/Nut
Cast bronze. Screw size is #8. Strainer is 3" x 4", except for 65DP7PLB which is 3-1/4" x 4-1/4". Includes nut. UL Listed. NOT TO BE USED IN POTABL...
View full details1-1/2 Thru Hull Connection
Molded white plastic with broad flange. For use with hose. Not recommended for use below waterline.
1-1/8 Thru Hull Connect Bulk
Molded white plastic with broad flange. For use with hose. Not recommended for use below waterline.
1 Thru Hull Connection Bulk
Molded white plastic with broad flange. For use with hose. Not recommended for use below waterline.
3/4 Thru Hull Connection Bulk
Molded white plastic with broad flange. For use with hose. Not recommended for use below waterline.
1/2 Thru Hull Connection
Molded white plastic with broad flange. For use with hose. Not recommended for use below waterline.
Sea Water Strainer, 1-1/4"
Designed to deliver full flow of liquid at ultra low pressure differential while providing effective filtration. Stainless steel screen provides a ...
View full detailsSea Water Strainer, 1"
Designed to deliver full flow of liquid at ultra low pressure differential while providing effective filtration. Stainless steel screen provides a ...
View full detailsSea Water Strainer, 3/4"
Designed to deliver full flow of liquid at ultra low pressure differential while providing effective filtration. Stainless steel screen provides a ...
View full detailsSea Strainer Bowl, 1-1/2"
Sea Strainer Bowl, 1-1/2"
Top Strainer With Non-Return
Mount in the lowest part of bilge to secure the intake line. Strainers are valuable in minimizing intake of debris. Supplied with non-return valves.
Side Strainer With Non-Return
Mount in the lowest part of bilge to secure the intake line. Strainers are valuable in minimizing intake of debris. Supplied with non-return valves.
Fairview BVB38 Cast Brass Full-Flow Ball Valve, 3/8" IPS
Brass valves for use in W.O.G. = Water, Oil and Gas: W.S.P. = Working Steam Pressure applications.Two piece Full Port body w/Blowout-Proof Stem &am...
View full detailsFairview BVB38 Cast Brass Full-Flow Ball Valve, 3/4" IPS
Brass valves for use in W.O.G. = Water, Oil and Gas: W.S.P. = Working Steam Pressure applications.Two piece Full Port body w/Blowout-Proof Stem &am...
View full detailsFairview BVB38 Cast Brass Full-Flow Ball Valve, 1/2" IPS
Brass valves for use in W.O.G. = Water, Oil and Gas: W.S.P. = Working Steam Pressure applications.Two piece Full Port body w/Blowout-Proof Stem &am...
View full detailsFairview BVB38 Cast Brass Full-Flow Ball Valve, 1-1/4" IPS
Brass valves for use in W.O.G. = Water, Oil and Gas: W.S.P. = Working Steam Pressure applications.Two piece Full Port body w/Blowout-Proof Stem &am...
View full detailsFairview BVB38 Cast Brass Full-Flow Ball Valve, 1-1/2" IPS
Brass valves for use in W.O.G. = Water, Oil and Gas: W.S.P. = Working Steam Pressure applications.Two piece Full Port body w/Blowout-Proof Stem &am...
View full detailsFairview BVB38 Cast Brass Full-Flow Ball Valve, 1" IPS
Brass valves for use in W.O.G. = Water, Oil and Gas: W.S.P. = Working Steam Pressure applications.Two piece Full Port body w/Blowout-Proof Stem &am...
View full detailsFairview 2101C 3-Way Brass Ball Valve, 3/8" IPS
Pipe female ends 3 port 2 -way.NOT TO BE USED IN POTABLE WATER SYSTEMS.
Fairview 2101B 3-Way Brass Ball Valve, 1/4" IPS
Pipe female ends 3 port 2 -way.NOT TO BE USED IN POTABLE WATER SYSTEMS.
In-Line Strainer, 1/2" Hose
Prevents dirt and other particles from entering pump intake. Cuts down on repairs. Transparent housing for quick inspection, 50 mesh stainless stee...
View full detailsJabsco 464000002 Pumpguard Fine Mesh In Line Strainer, 1/2" Hose Barb In/Out, Straight
This compact pre filter prevents particles jamming valves and causing pump breakdowns - we’ve given it a screw off, transparent housing for easy in...
View full detailsJabsco 462000000 Pumpguard Coarse Mesh In Line Strainer, 3/4" Hose Barb In/Out, Straight
This compact pre filter prevents particles jamming valves and causing pump breakdowns - we’ve given it a screw off, transparent housing for easy in...
View full detailsThru Hull-1-1/8
These Thru-Hulls are ideal for salt water use because they are impervious to electrolysis and corrosion. For use with hose to allow water to pass i...
View full detailsThru-Hull Fitting 3/4"
These Thru-Hulls are ideal for salt water use because they are impervious to electrolysis and corrosion. For use with hose to allow water to pass i...
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