GROCO 1/2" Bronze In-Line Check Valve

The GROCO 1/2" Bronze In-Line Check Valve (model CV-50) is a precision-engineered flow control device designed for fuel systems, marine applications, and other liquid transfer lines where backflow prevention is critical. Cast from C83600 bronze—a corrosion-resistant copper alloy—this check valve delivers reliable unidirectional flow in environments where exposure to diesel, gasoline, saltwater, or other harsh conditions demands material durability and chemical stability.

The 1/2" NPT (National Pipe Thread) threaded ports provide standard compatibility with fuel lines, hydraulic systems, and marine plumbing configurations across a range of equipment and vessels. Bronze construction resists corrosion far better than steel alternatives, a critical advantage in saltwater marine applications or systems where condensation and moisture exposure are routine. The inline check valve mechanism allows unrestricted flow in the forward direction while automatically sealing under reverse pressure, protecting downstream systems and preventing siphoning or contamination from backflow.

This valve suits fuel transfer in boats, RVs, stationary generators, and mobile fuel systems where gravity or pressure changes could otherwise cause fuel to flow backward and damage engines or fuel pumps. It is equally at home in industrial fluid systems, fire suppression lines, and circulation loops where check valve integrity directly impacts system longevity. The 1/2" size fits compact spaces while delivering sufficient flow capacity for most gravity-fed or pump-assisted applications up to 2" (standard GROCO size range).

GROCO has built its reputation on precision marine and fuel-system components, and the CV-50 represents the practical engineering typical of the brand—no unnecessary complexity, materials chosen for real environmental demands, and proven performance across decades of marine and industrial use.