Sewage in the Ptrap


Old 07-07-03, 01:16 PM
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Sewage in the Ptrap

We have a 65-year-old home. In the laundry room in the basement there's a floor drain with a P-trap. It seems as though the P-trap remains filled with sewage, though it doesn't overflow. I've poured a few gallons of water down the drain, and the smell convinces me that it's sewage. As a test, I poured several gallons of water down the drain until the smell became less intense. Then a couple of days later I came back, poured more water, and the smell was as intense as before. Working with my limited knowledge of plumbing, I would not expect this. Any suggestions why this my be happening? Is this an indication of a problem?

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Old 07-07-03, 01:36 PM
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It's an indication that the main drain line is partially clogged and backing up to the lowest point in the drain/waste/vent system.
Open a clean-out plug and snake the main line from the house to the street or septic tank with a long, heavy-duty plumber's snake.
If that doesn't do it, you may have roots in the line, and it will have to be "roto-rootered", but be aware that this will only last a couple of years at most, and the roots will return.
The only permanent soluition to roots (if that's what it is), is replacing the pipe.
Good Luck!
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