WATTS® Thermostatic Mixing Valve, Series: LFMMV, 1 in Nominal, PEX Union, 150 psi, 200 deg F, 0.5 to 20 gpm Flow, Cast Copper Silicon Alloy Body, Buna-N®/EPDM O-Ring, 5-7/8 in W x 5-7/8 in H, Domestic