Well since someone was saying there are very few challenging threads on the site these days here's a bit of a head scratcher.
I have hot water heat between my boiler system in my shop and the old house. Everything except about 50' out of the ~350' run is buried underground in a 4" corrugated drain tile with a triple layer of reflectix insulation (High R value double foil backed bubble wrap stuff) .
The one part still exposed is where it passes through the edge of the hole for the basement for the new house. I was gone for a few days over the weekend and the boiler was shut down figuring the forecast was saying nothing would be much below freezing at night while I was gone but it froze the pipes just the same.
So given that any theories on how to thaw out a well insulated all plastic pipe inside another plastic pipe other than just wait until the weekend and we get back up into the 50's for a day or two while staying over freezing temps at night and nature does it for me?
I have hot water heat between my boiler system in my shop and the old house. Everything except about 50' out of the ~350' run is buried underground in a 4" corrugated drain tile with a triple layer of reflectix insulation (High R value double foil backed bubble wrap stuff) .
The one part still exposed is where it passes through the edge of the hole for the basement for the new house. I was gone for a few days over the weekend and the boiler was shut down figuring the forecast was saying nothing would be much below freezing at night while I was gone but it froze the pipes just the same.
So given that any theories on how to thaw out a well insulated all plastic pipe inside another plastic pipe other than just wait until the weekend and we get back up into the 50's for a day or two while staying over freezing temps at night and nature does it for me?