These psvs were Shined up with a buffing wheel. The Aquatrol 69A1a1m2u1 is an adjustable relief valve designed for use with a range of pressure levels from 116 to 275 psi. Made with a durable bronze body, this valve is suitable for various media including water, oil, fuel, air, and wastewater. With a 1-inch inlet and outlet diameter, and manual valve operation, this product is ideal for controlling and regulating pressure in industrial systems. Proudly manufactured in the United States by the trusted brand Kunkle, this relief valve offers reliability and precision for a wide range of applications.