I have a bathroom sink that's against an outside wall. The vent for the sink drain goes straight through the wall and then up outside the house to the eaves. When it gets cold (single digits), the water in the P-trap freezes into a solid plug and stops the sink from draining. I've put as much insulation in as I can, but it still freezes when it gets bitterly cold. Any ideas how I might be able to resolve this without re-routing the vent line or boxing it in? I've thought about placing a small hot pad around it or hanging a light bulb near by, but this is a guest bathroom and it's a pedestal sink, so anything that I put around the P-trap itself would be visible.
- posted
19 years ago