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I think we have a clog of dried soap in our pipes, past the U-bend and down the pipes from upstairs to the drain at ground level.

How do I clear them?

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4 Answers 4

  1. Moving water, preferably hot. If you can get a small flow that doesn't back up then it will dissolve away easily.
  2. Environmentally safe degreaser/cleaner, I prefer Simple Green
  3. Baking soda and vinegar, it will clean almost any small clog. With something that dissolves easily like soap, the extra air bubbles produced will help getting it clean with less passes as well.
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I have tried all of these but we still get an overwhelming smell of soap in the house that makes it difficult to breath easily, not sleeping unless windows wide and cold airflow in house. –  Nikki myers May 11 '13 at 9:16
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It sounds like you have some other issues then, if it is past the "U-bend" or p-trap then it should not affect any smell inside the house. If somehow it is, then you have larger issues as it means you are also leaking sewage gas into the house which - aside from smelling way worse than soap - can easily make people sick. –  Jason May 12 '13 at 12:12
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Any of the below options are good for a start without a more specific problem

  1. Mo-flow drain acid (made by Momar)
  2. Caustic Soda
  3. Boiling water
  4. Drain Eel
  5. Draino
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I would skip all the chemicals and just use a drain auger on it to clear the build up. After you break through then you could probably rely on hot water to clean anything remaining out.

Auger

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Option 1: Mix 1 cup baking soda, 1 cup salt, and 1 cup white vinegar. Pour it down the drain and wait 15 minutes before flushing the drain with hot water.

Option 2: Drain gun from your local Home Depot.

Option 3: Drano(sodium hydroxide, sodium nitrate, sodium chloride, and aluminum).

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