Karl Townsend wrote:
I need to set up a quick and easy way to protect a dishwasher, a clothes
washer and a water softener from freezing...

I'd put a snorkel, stone filter and check valve at the highest point in
the system and a valve to the sanitary sewer at the lowest point in the
system. Shut off the house supply and open drain valve. Check valve
allows air to displace water. Presto!

My first plan is to solder a Tee and two valves in the water line near each
unit. Switch valves so that an air hose can pressure blow unit out. (I'll be
doing this through out the water system to blow all water lines out) Or, do
I need to get more fancy and figure some way to pump RV antifreeze in?
Anybody got an idea on a quick easy way to pump a couple quarts in?

I've never tasted RV antifreeze but I think that isn't the healthiest
thing to put in your water line. I'd go with air. Air is good.

--Winston