Blow out water lines question

davehultin wrote:
I used to blow out our lines, but would still use the pump bypass to pump some antifreeze through the pump, and also pour some antifreeze into all the drains. I'd blow the lines for about 30 minutes for each faucet, and I never ever had any problems using the "blowing it out" method.

Now I blow it out and fill the lines with antifreeze. I figure at < $10 the antifreeze is a pretty inexpensive insurance policy.

Think we winterized and de-winterized 4 times last year as we camp through Dec and early as Feb if it's relatively close to or above freezing on a weekend. Used only air.

We used air the first time this Fall. This time though, we heard a lot of gurgling and couldn't get what I felt was enough water out of the lines. Around 35-40 psi on the compressor.

So we ran a little pink after blowing the lines and indeed, quite a bit of water was pushed before the pink. Yikes. We do leave the faucets open so there's room for expansion so don't think it would have been an issue but running pink took less than 10 min, 2 gallons ($5.00).

Estimate it will only take around 5 gallons to flush all of it so no biggie. Bonus was that Keystone put a petcock on the water pump and all we had to do is flip it to the cut off hose they attached to the pump and stuff the end into the bottle of antifreeze. Flip the pump and off we go. Effortless and no mess. Piece of mind.

And as an aside, our pex is stamped 100psi as I'm guessing most all RVs are. What a tech had mentioned is the connectors and elbows may not always be rated the same...not sure. I'm sure one of our techs on here can chime in.