If you guys on water wells and have tanks in the garage or? The nipple below the pressure switch will freeze first. Most will over look it when wrapping heat tapes and such. A light hanging in with a good built insulated well house will help. Light and heat tape on crappy well house. My well house has no insulation, but has a heat tape on every line and the nipple. -6 and nary a issue.
If pressure tank is inside, a good space heater will suffice, but I like heat tapes. I remember back in the early 70’s when they hit the market. On frozen up city water to homes, best advice I can give is one the cabinets and faucets in whole home to help with thawing. Crawl spaces we use a kerosene force heater blowing under the home, set it back a couple feet from entry to crawl space and let it run. We have electrical current machines two, but good ole heat blowing under is faster. Good luck out there! And dripping don’t work in these temps, need a steady stream going!
I have a propane force heater but a little scared to do that. Frozen or busted pipes are easier to deal with than the crawl space on fire.
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