Originally Posted by edt
I wanted to blow out water lines with filter in place you have take it open to dump water it is not a park model by some tech 12 volts and holding tank but no one wants to tow 42 feet trailer
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OK you lost me there...
Gathering the tiny clues leads me to believe that you are looking to use compressed air to blow out the lines for winterizing your unit. So here is my suggestion: remove the filter from the housing bottom and screw the empty bottom section back on. Drain & bypass your water heater. Open all valves one at a time with 50 lbs of air pressure at the hose bib. The amount of water in the line between the hose bib and the filter is minimal so it all should just go into the bowl for post blow out dumping.
I would not put a new filter in until after sanitizing in the spring. BTW, you still need to use antifreeze, just not as much.