I know about leaving the water dripping… but it still froze on me doing that once when it stayed below freezing for a couple days
… and where do yall put your pressure tanks ? … I would think they would freeze in your climate
.. sorry to bother you with the questions… I just find it interesting to see a house up off the ground where you live as that’s how we build them down here
Here in Pa waterlines from the well are buried a minimum of 36" deep, usually deeper to avoid freezing. Hot water tanks and pressure tanks are kept inside the house or basement. Houses are heated and basements never drop below freezing because of the surrounding ground.
Buildings with no basements that are on piers/posts generally use heat tape on the waterline from the well where it comes out of the ground in the crawlspace and into the pressure tank. When the heat tape I use at my camp is plugged in the built in thermostat will turn it off above and on below about 35 degrees.
Smaller waterlines are usually run in floor joists above the insulation then through the floor to their destinations. Heat from the building usually keeps them from freezing.
When I leave my camp in cold weather I drain everything; pressure tank, hot water tank, toilet, all the waterlines, I even have a drain-back valve installed in the well casing to drain the main waterline to keep it from freezing where it comes out of the ground in the crawlspace. Then I blow all the lines out with compressed air and dump some RV anti-freeze down the toilet and the sink and tub traps.