I use the air compressor method all the time here but the compressor is a tankless 12VDC model. It takes a longer time to build up pressure which is what I like to see when connected to the city water port.
They warn you against hitting the water lines with alot of air pressure...
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS