I had an air leak up front and determined it was one of the two step/step cover regulators. I replaced both with this Husky (Home Depot) part (regulator). This one was $25 but you can get them as cheap as ten bucks. <br/><br/>I think I'll buy one of the Norgren valves just in case. I had intended to take them out to disassemble and clean, however, when I tried to remove the...