GROCO 3/4" Bronze Nipple Check Valve

The GROCO 3/4" Bronze Nipple Check Valve (PNC-750) is an essential component for serious boaters and marine system installers, designed for use in through-hull and raw water lines. This check valve is built to withstand the rigors of marine environments, ensuring reliability when far from the dock.

Constructed from cast bronze, the GROCO check valve prevents backflow and siphoning, protecting your engine from saltwater intrusion. Its 3/4 inch NPT port size is compatible with standard marine cooling and discharge applications, while the nipple design allows for direct in-line installation, reducing potential leak points.

Ideal for anglers and boaters operating center consoles, cabin cruisers, and commercial fishing vessels, this check valve ensures that cooling systems remain clean and engines protected during extended periods at sea or in port. Its reliable internal ball-and-spring mechanism seals instantly under backpressure, safeguarding your engine's cooling jacket.