2000 Fleetwood Flair/32'/v-10 motor/F-53 chassis
I/we hook air to MH blow air out of each faucet,then connect hose to inlet of pump,put hose into rv antifreeze and run pump open each faucet till pink stuff comes out,don't forget outside shower,I run 4-5 gals through valves then pour 2 gal in fresh water tank,1/2 gal in the sinks & shower and pour a gal into toliet,then I turn pump on and run water till it comes out all valves.Maybe a little over kill but 10 gals cost less than 30 bucks and in 5 yrs never had a problem-If you have one pipe in the system freeze you will wish you ran the extra pink stuff through the system