GROCO 1.5-Inch Bronze NPS to NPT Flange Adapter

The GROCO 1.5-Inch Bronze NPS to NPT Flange Adapter gives a durable connection point for compatible marine plumbing where water must pass through the hull or transition between threaded pipe, valve, and hose components. Its marine-metal construction is designed for raw-water, drain, or other approved onboard systems.

The specific thread, flange, scoop, or hose geometry named in this model determines how it integrates with seacocks, valves, hose, or other plumbing hardware. Correct thread matching is especially important in below-waterline installations because incompatible thread forms can compromise engagement and mechanical strength.

Confirm thread standard, connection size, hull thickness where applicable, hose compatibility, fluid service, bonding practices, and required installation hardware before mounting. Use appropriate marine sealant and clamps, support connected plumbing to reduce strain, and inspect the completed installation carefully for leaks. More options in our bilge and water pumps.

• The fitting joins compatible hull, valve, pipe, or hose components.
• Model-specific threads and interfaces support proper system fit.
• Marine-metal construction is selected for the intended application.
• Correct bedding, support, and connection hardware help prevent leaks and strain.