Cariboocoot wrote: »
Properly burried pipes won't freeze.
Use of heat tape underground is not a good idea. It's not rated for ground contact, and would be a major pain to fix when necessary (no 'if' about it).
Plus, it uses valuable power.
If you have a depth/freezing incompatibility problem, you can run PEX through PVC or ABS with pipe insulation in-between, and/or cover the run with rigid insulation for more protection.
It is best to simply get the pipe below frost level, which varies depending on the climate where you are. It can be anywhere from a few inches up to 6'.
lorelec wrote: »
Despite all of the R-11 wrapped around the pipe, it still tends to freeze overnight when temps get into single digits. The pipe is about 2 feet in length or so. When it's frozen in the morning, we just plug in the heat tape for 10 minutes
mike90045 wrote: »
What kind of magic pipe do you have that does not crack when frozen?
I guess if each end is "unfrozen" then it does not burst.