Forespar Seacocks

When it comes to protecting your vessel from catastrophic water intrusion, Forespar offers a wide selection of extremely strong and reliable marine grade plumbing fittings, including glass-reinforced, non-corroding Marelon polymer seacocks. For boaters seeking an alternative to traditional bronze fittings that corrode and suffer from electrolysis, Forespar's innovative seacock systems represent a proven solution trusted by both custom yacht builders and production boat manufacturers worldwide.

The Marelon Advantage in Marine Seacocks

Forespar Marelon Seacocks & Valves are made with Marelon, a proprietary formulation of polymer composite compounds. This engineered material delivers exceptional performance characteristics that directly address the most common failure modes in marine through-hull systems. Molded from lightweight, high-strength Marelon, these seacocks are highly resistant to corrosion, UV degradation and abrasion, eliminating the dezincification and galvanic corrosion issues that plague bronze valves in saltwater environments. Their strength, light weight, and freedom from corrosion and electrolysis makes them the ideal valve for controlling inlet and outlet water requirements above and below the waterline.

Pro Series: Engineered for Performance and Serviceability

Forespar's Pro Series line of valves is designed to meet the demanding requirements of boatbuilders who need a product tailored to their specific installations, and boat owners who want the most reliable and rugged plumbing available. The Forespar Pro Series seacocks feature a unique three-part construction that sets them apart in terms of maintainability. Pro series valves feature a three-part construction that enables their versatility and long-term maintainability, and each valve can be easily disassembled for cleaning, as well as to replace the O-rings.

One standout innovation is the integrated emergency service feature. When the complete system is used Forespar supplies an emergency thru-hull plug as a cap in the handle, which can be used by plugging the thru-hull from the outside to allow full disassembly of the valve to clear a clog or replace the entire body all without having to haul the boat. This design consideration demonstrates the practical thinking that goes into every Forespar seacock, potentially saving thousands in haulout costs when maintenance is required.

Compliance and Configuration Options

Safety and standards compliance are non-negotiable in below-waterline marine fittings. Forespar seacocks exceed Marine UL and ABYC standards, and the Pro Series configurations are also ISO certified. Forespar seacocks offer more configurations and options than any other brand/style valves made for the marine industry, with thread matching available for both NPSM and BSP standards in sizes ranging from 1/2" through 2". Whether you need flanged mounting seacocks for retrofit applications or complete integrated systems with flush or mushroom thru-hulls, Forespar's comprehensive product line provides solutions for virtually any marine plumbing requirement.

Forespar is the only manufacturer to offer motorized Marelon seacocks (ROV systems) that meet and exceed all Marine U.L., ABYC and ISO standards, demonstrating their leadership in bringing advanced technology to marine valve systems. With decades of manufacturing experience and widespread adoption by premium yacht builders including Wally Yachts, Oyster, Swan, and over 100 production boat manufacturers, Forespar Marelon seacocks represent the modern standard in corrosion-free marine plumbing.