Quick Connect Blow out Plug Camco #36143 Blow-out plug by Camco. Completely clear your water lines with the Camco RV blow-out plug. Screw the plug into the city water inlet open all drains and faucets attach and activate air pump until all lines are clear. Patented. Connect straight from your air compressor to your City water inlet. Blows out all the water in your RV or camper system.