KOHLER K-304-US-NA Rite-Temp Valve with Stops, Pex-Expansion Screwdriver stops assist in repair, turn off water supply at the valve Back-to-back installation is ideal for unique or high-volume jobs Matching trim for all KOHLER(R) faucet lines available Provides anti-scald protection and temperature regulation at flow rates as low as 1.75 gpm; far below federally mandated standards of 2.5 gpm Large internal ports allow quick bath filling