Collection: Marine Plumbing & Ventilation - Thru-Hull Fittings

Build dependable connections through the hull.

Explore marine thru-hull fittings designed to provide secure connection points for compatible plumbing systems that pass through your boat’s hull. From water intake and discharge applications to drains and other onboard systems, properly selected thru-hull fittings are essential components of marine plumbing installations.

Shop marine thru-hull fittings, boat thru-hulls, bronze thru-hull fittings, stainless steel thru-hulls, composite thru-hulls, hose connections, threaded fittings, drain fittings and thru-hull accessories for sailboats, powerboats, fishing boats, cruisers, yachts and other marine applications.

Whether you're replacing an existing fitting, servicing an intake or discharge system, completing a refit or building a new marine plumbing system, Roam & Harbor makes it easier to find thru-hull fittings and supporting components for your vessel.

Pair your thru-hull fittings with compatible seacocks, valves, strainers, marine hose, clamps and plumbing fittings to complete your onboard system.

Always verify fitting diameter, thread type, hose size, hull material, fitting material, installation location, above- or below-waterline suitability and manufacturer specifications when selecting a thru-hull fitting. Components installed below the waterline require particular attention to proper material selection, installation and compatibility.

Make the connection. Build it for the water. Adventure Starts Here.™