Looks like the one I ordered will fit, doesn't look like it will allow any through to the bypass, ever, but like hotrod said, the heater will act as a bypass. The one that looks like a drain screen doesn't look like it shuts any flow to the bypass off. Does anyone know where the big thick O ring goes? It didn't come with one for the outside of the housing, the old one will work for that. Not sure how the new thermostat is supposed to stay together, it's split.
