Has anyone used an automatic drain valve on a gas heater bypass loop?
I am replacing all the equipment on my pool pad, and doing a full re-plumbing job. I only use the gas heater a few times a year to heat the attached spa, so I am adding a bypass around the heater. I am thinking it would be a good thing if the water automatically drained out of the heater loop instead of sitting for months getting stale.
A simple sprinkler automatic drain valve should drain most of the water out when the loop is not pressurized. Any thoughts?