harold1946 wrote:
With water in the pump it can freeze and break, along with the lines from the tank and any water that is in the lines at a low point.
Point A is a good one.
The pump might be a problem as would the water heater tank if it is left totally full.
And this is not a "theory". It is a fact of physics.
Like I said, ask a plumber.....one with some actual experience.
My folks wintered in Florida for near to 30 years.
They turned off the water at an underground valve/drain.
They drained the water heater, toilet tanks and opened all the faucets.
In 30 years, there were no problems.....with temps going down near -20 F at times.
I can not explain the anecdotal "evidence" of others.
Water simply freezing in a P-trap should NOT cause a problem......because there is room for the ice to expand in two directions as it freezes.
