i have a nasty smell coming from the drain pipe in my laundry closet. it just recently started, the inside of the pipe itself looks a little moldy/dirty but nothing too bad. anyone have this problem or know what it could be casuing it. the smell is pretty bad at times.
Here is a possibility Has any water been allowed to run into the drain recently ?? If not, then the "trap" has probably dried out. You should have a water trap somewhere behind or under the drain. It should always have some water in it to "seal" the pipe from allowing sewer smells from entering the house. Same under your sinks and in the toilet.
Also possible the trap is leaking, and won't hold water.
--reed
Pour some baking soda in the pipe followed by white vinegar. Then tape the drain up and allow it to sit for 30 mins. Then flush with hot water.
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