Marty, our 1/2" and 3/4" (small body) model 520 series mixing valves can close off the hot completely. Our 1" (large body) models do not. If you installed a small body and are still experiencing this, it is possible that there is debris or buildup in the body preventing complete hot closure.
Marty, our 1/2" and 3/4" (small body) model 520 series mixing valves can close off the hot completely. Our 1" (large body) models do not. If you installed a small body and are still experiencing this, it is possible that there is debris or buildup in the body preventing complete hot closure.