Marine Plumbing & Ventilation - Thru-Hull Fittings

Thru-Hull Fittings for Secure, Watertight Marine Connections
Ensure safe and leak-free plumbing with our premium selection of marine thru-hull fittings, designed for long-lasting performance in critical below-the-waterline applications. Whether you're outfitting a new vessel or replacing old hardware, these fittings provide reliable, watertight connections for intakes, drains, and discharge systems.

Choose from a range of sizes and materials including bronze, stainless steel, and marine-grade plastic, all engineered to resist corrosion, UV damage, and harsh marine conditions. Our collection includes straight and angled thru-hulls, with threaded or barbed ends to suit a variety of hose and valve setups.

Shop our thru-hull fittings today to keep your boat’s plumbing secure, efficient, and built to last—above and below the waterline.