Specifications Item Model Number: HPSF03D Main Material: Lead-Free Brass Inlet & Outlet Connection Sizes: 3/4 NPT x 3/4 PEX-B Pressure Relief Valve: 3/4 NPT x 3/4 NPTT Working Pressure (Isolation Valve): 500 WOG Pressure Relief Valve Rating: 150 PSI/205 kBTU Net Weight: 2.90 lbs/1.315 kg Package Content 1 x Tankless Water Heater Cold Valve 1 x Tankless Water Heater Hot Valve 1 x Pressure Relief Valve 1 x Thread Seal Tape 1 x User Manual