Marine Thru-Hull Fittings, Seacocks & Strainers
Every fitting that passes through your hull below the waterline is a potential point of failure, which is exactly why it deserves better than a "good enough" part. CritPro carries thru-hulls, seacocks, and strainers built to hold up under constant water pressure and exposure, as part of our full boating selection for boat owners who don't want to think twice about what's below the waterline.
What to Look for in Thru-Hulls, Seacocks & Strainers
Bronze and marine-grade composite thru-hulls resist corrosion far better than lesser materials, and mixing incompatible metals below the waterline is one of the most common causes of galvanic corrosion that damages fittings from the inside out. Match the seacock size exactly to the hose and thru-hull it connects to, since an undersized or mismatched valve creates both performance and safety concerns.
Strainers protect pumps and raw water systems from debris, and matching the strainer capacity to your pump's flow rate helps maintain proper water flow. Every seacock should open and close smoothly without excessive force. Inspect thru-hulls, valves, and strainers during every haul-out to identify worn components before they become a problem in the water.
What This Category Covers
Thru-hulls, seacocks, and strainers at CritPro include bronze and composite thru-hull fittings, seacocks, marine ball valves, raw water strainers, hose barbs, fittings, and related installation hardware. Whether you are replacing an aging seacock or building a new below-the-waterline plumbing system, this category provides the components needed for safe and reliable operation.
Pairing Thru-Hulls with Other Boating Equipment
Thru-hulls and seacocks work directly with bilge and water pumps, freshwater systems, and marine sanitation equipment, making routine inspection of the entire plumbing system a smart maintenance practice. Explore our complete Marine Plumbing department for pumps, hoses, fittings, freshwater systems, marine toilets, and other plumbing components that help keep your boat operating safely and efficiently.
Browse the full Thru-Hulls, Seacocks & Strainers selection at CritPro, or explore all boating gear to keep your boat protected above and below the waterline.
