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daisy123

07:50PM | 12/13/05
Member Since: 12/12/05
2 lifetime posts
Bvplumbing
I wrote in the other day and asked about a dirty smell coming from my sink when my washer was on. I noticed today that it smells when the dryer is on, not the washer. Please help.

doug seibert

12:40AM | 12/14/05
Member Since: 08/10/02
842 lifetime posts
Hey daisy......

A sink drain has a U-shaped trap (P-trap) that is filled with water that prevents the stinky sewer gases from entering the house.......Looking into the drain with a small flashlight might be useful to see if there is a water seal......

There are MANY causes for a dry stinky trap.....An infrequently used powder room drain could easily dry-up and allow the odor to enter.....The sink/drain could have debris in it allowing it to siphon dry.......ALSO the washer could be s u c k i n g the water from the drain because of a clog in the normal drain/venting system (the dryer in a tight house could also pull a negative pressure)......And another cause may be the sink itself: the Overflow area of the sink can develop a growth of "yuck" above the trap area........

First step is to find when/where the smell is........TRY adding a cup of water to the stinky drain (slowly to fill the drain/trap) to see if the odor persists.......

And then post back......KNOWING the age and condition and arrangement of the plumbing might also be useful.......
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