The Neptune 5027K51 RV-C20 Pressure Relief Valve RV-316 is a high-quality relief valve designed for use in RV, trailer, and mobile home applications. Made of durable stainless steel, this valve features a 1/2 inch inlet and outlet diameter, with a maximum adjustable pressure of 2,000 PSI. Manufactured in the United States by Neptune, known for their innovative and reliable products, this pressure relief valve ensures the safety and functionality of your hydraulic system.