GROCO 1-1/4" NPT Bronze In-Line Ball Valve

The GROCO 1-1/4" NPT Bronze In-Line Ball Valve is a marine-grade isolation valve engineered for freshwater and saltwater systems where reliable flow control and durability are non-negotiable. Designed for boat owners, RV enthusiasts, and marine technicians, this in-line valve provides positive shut-off capability in high-vibration and corrosive environments. Bronze construction resists saltwater degradation, making it an industry standard for through-hull fittings, seawater cooling loops, and pressurized water systems aboard vessels and coastal installations.

Built with female NPT (National Pipe Thread) connections, the 1-1/4" valve accepts standard NPT male adapters and fittings for straightforward plumbing integration. The full-port ball design minimizes flow restriction while the selectable handle rotation allows you to orient the lever in any position for ergonomic operation in tight spaces or high-traffic areas of a vessel. A grease zerk fitting on 1-1/4" and larger valves enables periodic lubrication in the open position or provides drain access—critical for winterization and maintenance in seasonal storage scenarios.

This valve is ideal for galley water systems, head through-hull applications, engine cooling circuits, and any pressurized marine plumbing where isolation capability is essential. Its compact footprint (measuring 5 × 3 × 7 inches) fits easily into tight engine compartments and cabinetry. Installation requires only a standard wrench and NPT-compatible hose or pipe; the valve's proven GROCO engineering ensures years of leak-free service in demanding saltwater and freshwater conditions without requiring special tools or frequent maintenance intervention.