Make winterizing an easy, one-person job! Screw the RV360 Blow-Out Hose into your RV's city water inlet, then connect your air compressor quick-connect hose. Unlike other blow-out systems, this system leaves your hands free to open faucets and flush out water lines without assistance. Heavy-duty brass fittings and 45 PSI rated hose offer extra durability. Quick-connect air hose adapter sold separately. 3/8"" air hose 3/4"" male water hose fitting 1/4"" female pipe thread | RV360 Blow Out Hose