A seacock is a valve on the hull of a boat or a ship, permitting water to flow into the vessel, such as for cooling an engine or for a salt water faucet; or out of the boat, such as for a sink drain or a toilet.

Seacocks are marine valves that are mounted on the hull of a boat and allow water to enter or exit the boat. They are usually made of bronze, stainless steel, or plastic (marelon) and have a lever or a …

Forespar Marelon Full-Flow Seacock with Mushroom Thru-Hull Item # 865987 Description Features: Integrated 2-part system comes complete with a Marelon® valve and properly matched mushroom …

Mar 7, 2018 · Learn everything about seacocks in this West Marine Advisor. Understand their purpose, types, maintenance tips & how to choose the right seacock for your boat.

Apr 16, 2025 · Servicing and lubricating a boat seacock is essential for ensuring reliable operation and preventing corrosion or seizure. Begin by closing the seacock and making sure the boat is out of the …

A seacock is a valve installed directly onto the hull of a boat to manage the flow of water into or out of the vessel. It acts as a mechanical barrier, allowing onboard systems to operate while maintaining …

Apr 21, 2025 · Seacock: A valve (usually bronze) on the inside of the boat, which screws onto the through-hull. The seacock controls flow through boat’s raw-water inlets (engine cooling system, …

Nov 20, 2025 · A seacock is the valve attached to the through-hull. Usually, a through-hull is visible only from the outside of the boat, while the seacock is visible only from inside the hull.

Find everything you need for your boat's plumbing system including boat valves and seacocks at Great Lakes Skipper. Browse our massive inventory today.

May 4, 2022 · Seacocks – the small valves on the boat’s hull which allow water to flow through – are one of the most important fittings on the whole boat. Seacocks are used for a range of purposes, …

Dec 5, 2024 · A seacock is a type of valve installed on the hull of a boat that allows water to flow into or out of the vessel. Primarily found on through-hull or ‘skin’ fittings, seacocks can be shut off to prevent …

What is a Seacock? A seacock is a type of valve installed in the hull of a boat at points where water is allowed to enter or exit (such as for engine cooling, toilets, or bilge pumps). It provides a way to shut …

Oct 17, 2022 · Every boat that brings aboard raw water to cool the engine, whether the raw water flows through the engine or through a heat exchanger, needs a completely dependable seacock or thru …

Groco's Bronze Full-Flow Safety Seacocks feature an NPT-threaded side port for permanent installation of an in-line ball valve or other threaded component. Enables engine to function as a bilge pump in …

A seacock is a valve on the hull of a boat or a ship, permitting water to flow into the vessel, such as for cooling an engine or for a salt water faucet; or out of the boat, such as for a sink drain or a toilet.

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Fisheries Supply, a premier supplier of marine equipment, carries Forespar Marelon seacocks in both mushroom or flush thru hull options. Our representatives can help you choose the right Marelon …

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