The Cash Acme NCLX-A Temperature and Pressure Relief Valve is designed to protect Hot Water Heaters and storage tanks from over pressure or temperature. The NCLX-A incorporates an inert thermal element coating that provides effective isolation from mineral deposits (liming). Cast bronze body with male inlet and female outlet, brass and stainless steel internal parts, silicone seat disc and stainless steel spring. Test lever standard. Temperature relief setting is 210°F (99°C).