GROCO 1-1/2" Bronze Flanged Full Flow Seacock

The GROCO 1-1/2" Bronze Flanged Full Flow Seacock is a mission-critical through-hull valve engineered for marine plumbing systems where unobstructed water flow and reliability are non-negotiable. Designed for naval, commercial, and serious recreational vessels, this seacock provides the corrosion resistance and durability required in saltwater environments. The full-flow design ensures minimal pressure loss while maintaining the structural integrity needed for demanding marine applications.

Constructed from high-quality bronze, this 1-1/2" flanged seacock resists galvanic corrosion inherent in saltwater exposure and maintains its performance across extended service intervals. The flanged configuration provides a secure, leak-proof connection at the hull or manifold mounting point, while the full-flow ball valve mechanism allows rapid shut-off without cavitation or pressure spikes. The bronze body provides superior longevity compared to lesser materials, ensuring decades of dependable service in harsh marine conditions.

This seacock is ideal for through-hull installations in cooling systems, head plumbing, ballast systems, and emergency bilge applications where fast, reliable isolation is essential. Installation requires a 1-1/2" through-hull fitting, and the flanged design accommodates both internal and external manifold setups. Marine engineers and vessel operators rely on GROCO seacocks to prevent catastrophic through-hull failures and maintain watertight integrity during maintenance or emergency situations.