Installs In Just Under 4" of Space;Quicker, Consistent Quality Installations;Color-Coded Compact Lever Handles;Allows for Easy Cleaning or Flushing of System;Allows for One Person Diagnostic Testing;Also for Use with Wall Hung and Combi Boiler;Saves 90 Minutes;Replaces 13 Components;Eliminates 12 Leak Paths;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;Available in FIP Union x FIP, FIP Union x SWT, FIP Union x PEX;Certified to NSF/ANSI/CAN 61 & 372