I have about 10 feet of well PE black pipe from the ground in the crawl space to the utility closet (inside heated living area in cabin).
Utility closet has the pressure tank and water heater and is in a heated space. Pressure tank and water heater are fully functional with pressure switch. PE has thick aluminum foil and new unused heat tape over it, no insulation.
Crawl space for now is essentially open as I have the small windows open to dry it out. Once I close the windows, its still not really sealed very well.
I dislike working with fiberglass...any thoughts on how long the tape will work down to what temperature? What else can I use to insulate the pipe with?
As an aside, I used to keep a ceramic heater down there to keep the pipes unfrozen, at least in the dead of winter, January February. Otherwise it was usually ok. At that time the pressure tank and water heater were downstairs. Fixed that!
"Don’t cover heat tapes with insulation even if the tape manufacturer permits it."
"If you do add insulation, only use fiberglass or another non-flammable material. Do not use foam or vinyl insulation as they could catch fire easier."