Blow out winterizing question

TakingThe5th wrote:

Old Duck wrote:
What am I missing, can't figure out why the lines need blown out, then pump in antifreeze.? I've blown them out, not using the pink stuff, last year used the pink stuff. I but a bunch when it is on sale so get it for about $3. Cheap peace of mind if we get. cold snap and flushes easy the 2 or 3 times we winter camp

I blow the lines out AND use the pink. There are two ways to get your fresh water when camping - city water or the fresh water tank via the pump, I blow out the lines using the city water inlet and I pull in the pink stuff using the pump after I drain the fresh water tank.

I worried that the city water line might still contain water if I simply pumped the pink stuff, since there is a check valve at the inlet that could create an air block and hold some water in that line. Blowing that line out eliminates that possibility.

Exactly, and I blow out the black tank flush before I add the pink stuff.

So blowing the lines out, then pumping the pink stuff covers all the bases in my opinion.