The Speakman Eyesaver SEF-TW Thermostatic Mixing Valve Kit is a thermostatic mixing valve kit for the SEF-1800 & SEF-9000. The SEF-TW features an SE-370 single element, thermostatic mixing valve capable of supplying 7 GPM of tepid water. The SE-370 provides 5 GPM cold water bypass in case of hot water or thermostatic element failure. Speakman® Thermostatic Mixing Valve Kit, Eyesaver®, 125 psi, 120 to 180 deg F Hot/33 to 80 deg F Cold, For Use With: Speakman SEF line of Eyewash and Faucets, Brass, 24.6 in L x 14.7 in W x 15.1 in H, Import