Simplifies storage tank water heater installations;FIP brass union for connection to the water heater;Integrated valves isolate the water supply and expansion tank for service;1/2" FIP cold water tapping for Water Heater Tempering Valve;1/2" FIP port for installation of vacuum relief valve and 1/8" plugged gauge port;Compatible with 3/4" MIP expansion tanks up to 5 gallons - Compact version available if expansion tank is not required;Includes support hardware, WHTV, & vacuum relief valve;Compact version available if expansion tank is not required;Saves Time, Replaces Components, Eliminates Leakpaths;This valve is actuated by a blowout proof stem;Double O-ring Stem Seals;Models available to satisfy all state and federal low-lead laws;Patents Pending;Available in FIP Union x PRS, FIP Union x MIP;Certified to NSF/ANSI 61 & 372