I just had our Class A winterized and was wondering why could you not just blow out all the water lines and make sure you have "NO" water in the RV during the cold months? Yes, I am new at Rving. Gues...
Blowing out the lines (several times per water outlet) and adding the pink stuff to the drains is all I've ever done. Works fine. I do use 100 psi at the compressor, but there is always at least one faucet open so line pressure is much lower.