Good Sam RV Club Member
I put 30# air pressure on the water system from outside and turn the washer on fill Hot/Cold until I hear air and all water is gone out of the lines. Then I put about 4 cups of Pink antifreeze in the machine and turn it to drain/ spin. I have never had a problem over all the years of doing it this way.
Greg,Sylvia & Dudley (miniature schnauzer),30' Lacrosse 272, 1 slide Chevy 2500 4x4 crew cab