If you had your pump/fresh water tank system winterized with anti freeze and have not used it since and only ran on city water you should be OK.. If you have any doubts then I would winterize it again... If you’re trailer is equipped with a antifreeze inlet it’s pretty simple, just hook up a hose to it, stick it in the antifreeze and turn the pump on... If not then take the fresh water pick up off your fresh water tank and stick it in anti freeze and turn the pump on...
Ive been using air for 2 seasons without issue... You can’t just hook up the air compressor and open all the outlets... You need to be sure you get the pressure up to 40 psi, do each hot and cold water outlet individually until no water comes out and wait between each outlet to assure the air pressure recovers back to 40 psi...
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Gerry Z
2018 Forest River Heritage Glen 272RL
2018 Ford F150 Lariat 3.5 Ecoboost Max Trailer Package
Curt Trutrack WDH
HD Roadmaster Active Suspension
3200 Firman Generator/Inverter
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