GROCO 2" Bronze Flanged Full Flow Seacock

The GROCO 2" Bronze Flanged Full Flow Seacock (model BV-2000) is a marine-grade through-hull valve engineered for unrestricted water intake and discharge in demanding saltwater environments. Built from bronze, this seacock delivers the full port flow and corrosion resistance required for reliable operation aboard fishing vessels, cruising sailboats, and commercial marine applications where sea suction lines, cooling systems, and through-hull fittings demand durability and minimal pressure drop.

Key features include a tri-flange base and standard mount hole pattern that simplifies retrofit installation when replacing seacocks from major competitors. The 2-inch size accommodates high-volume water flow requirements common on larger vessels. The valve incorporates a grease zerk fitting for periodic lubrication (when in open position) and a drain plug—both essential for maintaining smooth operation and extending service life in corrosive saltwater. The selectable handle rotation allows customized orientation to fit confined locker spaces. A square hole in the handle accepts a standard ratchet, enabling operation when direct hand access is impossible—critical when seacocks are mounted deep within engine compartments or behind tight cabinetry.

This seacock is specified by marine surveyors and experienced boat owners who prioritize reliability and repairability. Unlike plastic or composite valves, bronze construction withstands the thermal and chemical stresses of repeated seasonal use and salt spray exposure. The full-flow design ensures minimal flow restriction—important for maintaining engine cooling efficiency and preventing cavitation in raw-water cooling systems. Suitable for both new installations and as a direct replacement in existing through-hull applications.

Marine through-hull seacocks are essential safety components; this GROCO model represents the standard for serious cruising and commercial fishing operations where equipment failure is not an option.