I noticed that everyone thinks the valve is a good idea and I agree. But, your problem may be something many guys miss. There is a feed side of the heater and a return side. If you reverse the hoses from the water pump and return, then hot water will migrate up the hose into the heater and heat the whole thing up. These valves can bypass a little water even when turned off The aftermarket in-line valve and the OEM valve need to be hooked to the right hose. Take a look and see if you don't have these reversed.
Last edited by beltfed; 03/13/2011 3:31 PM.
