Plumbeeze Full-Flow Design Sump Pump Check Valve features 1-1/2" male threads on the inlet side and an outlet designed to accept a 1-1/2" flexible discharge hose. Crafted from durable ABS thermoplastic, this check valve a full-flow design with a flexible rubber flapper that ensures a positive seal. It is built to withstand pressures up to 4.3 psi and temperatures up to 140 degrees Fahrenheit (60 degrees Celsius), making it reliable for various sump pump applications. The product comes packaged individually in a box for convenience and protection. Model Number: 2251