Bought a used Monaco in March 2010..Living in Indiana and not leaving until December I winterized the coach recently..I decided to blow out the lines since I could hook up compressor to the water compartment and blow out both hot and cold lines...I had drained lo lines and drained hot water heater and also turned water heater bypass on.....When blowing out water lines I could not blow past waterheater because air blew into waterheater tank...I overcome this by disconnecting cold water inlet to Waterheater and also disconnecting hot water out from waterheater and blowing out lines by bypassing waterheater completely.....
My question is since I have only one check valve (hot water outlet) and one bypass valve, would it make sense that the check valve on the hot water outlet may be stuck open.....................Or did I make a mistake by draining waterheater BEFORE I turned bypass on and applied air to lines?
