I have a raised ranch, circa 1969. I just had some air sealing/insulation work done to hopefully cut down on HVAC costs. Our bedrooms had been quite cold -- to cut down on that we had them blow in insulation between the garage and the bedrooms.
The crew that came out raised a concern that there's some water pipe running in the garage. Indeed, cold water pipe comes down from the garage ceiling in a U-shape with a turn-off valve that controls inside and outside water faucets. If I close that turnoff valve I'm able to drain most of the pipe, but there's still about 6 inches of uninsulated water pipe run leading to that turn-off valve.
What's the easiest/best way I can resolve this? Clearly in the past there has been enough warm air leakage from the rest of the house to keep that pipe length from freezing. I don't know how much of a difference adding the blown in insulation would make from a water temperature standpoint.
Options I see are:
- Wrap the pipe with foam insulation, tape it up, and keep the cold air off it.
- Add some heat tape around the pipe. Seems a touch wasteful as I only strictly need to heat about a 6-8 inch run.
- Bust open the ceiling, and rework the plumbing. I'm not sure what kind of valve would let me pop it through drywall as I'd need to allow control of the inside garage/outside house water faucets though. It seems if there were a good way to do this it would have already been plumbed this way...
Appreciate any thoughts..thanks!