The Water Source Spring Loaded Brass Check Valve is designed for use with water and has a maximum working pressure of 200 psi. Made from durable brass, this valve features a spring-loaded check valve mechanism to ensure reliable flow control. With a 1 1/2 inch diameter, this valve is suitable for various industrial and plumbing applications requiring a high-pressure solution. Designed by Water Source, this valve meets the standards for quality and performance in the hydraulics, pneumatics, pumps, and plumbing industry.