Webstone 44443WPR3 3/4" E2 EXP Tankless Water Heater Service Valves 4444W Series Lead free - meets all federal & state standards for lead levels in Drinking water system components 3/4 IPS lead free isolator EXP E2 with lead free pressure relief valve Hot and cold set tankless water heater service valve Full port brass ball valves with adjustable packing gland Hi-flow hose drains ( 500 WOG) &pressure relief valve ( 150 psi/200K BTU)