Plumb eeze Brass Pressure Relief Valve set @ 100 PSI for water well pressure tank, 1/2″ September 27, 2022 by adidaeng Price: $17.99(as of Sep 27,2022 02:33:35 UTC – Details) Recommended for all cold-water system installations. Protects against damage to piping and pressure tanks. Bronze Body, 140F Max. operating temp. Stainless steel spring and retaining screw.