I had the smelly trap problem. My washer & dryer are in the basement and the washer drain is very high- just under the floor joists. I shut off the heat in the living space above when the home is not in use. Water in the trap froze and caused a hairline crack along the threads in the trap drain plug. There was no noticable leak. I found the leak by tying a paper towel around the drain plug and over time noticed it was always damp and water stained.
Anyone aware of a trap that can withstand freezing without damage?
|