GROCO 1.5-Inch Bronze Pipe Nipple Check Valve

The GROCO pipe-nipple check valve combines a threaded pipe section and one-way valve in a compact marine plumbing component. It is intended for systems that need to discourage reverse flow without adding a separate check valve farther down the line. NPT threads at the connection points make the part straightforward to incorporate into compatible threaded plumbing. GROCO specifically excludes this valve from diesel-fuel and gasoline service, so it should be reserved for an appropriate water or utility circuit.

The valve uses cast marine bronze and is offered within a family covering common plumbing sizes. Its recommended maximum fluid temperature is 176°F, which gives the installer a clear operating limit when planning the application. That simpler layout can be useful where service space is limited and every additional threaded connection adds another inspection point. Integrating the check function into a nipple can reduce the number of separate fittings and sealed joints needed in the run.

• Integrated pipe nipple and one-way check function
• Maximum recommended fluid temperature of 176°F
• NPT threaded marine plumbing connections
• Not intended for diesel fuel or gasoline

Install the valve in the correct flow direction and use a thread sealant compatible with the fluid being carried. The connected pipework should be supported so vibration or hose weight does not twist the valve body over time. After commissioning, verify that forward flow is normal and that the valve is preventing the unwanted reverse movement it was installed to control. For other marine valves, adapters, and plumbing service components, browse Plumbing Valves & Accessories.