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I have a 10 year old house with (probably) 2" vertical waste line inside the wall (plastic at top). Lately we've noticed suds foaming out of the drain at the end of the rinse/spin cycle. It does NOT leak when the machine is pumped out, only at the end of the cycle. We have a 10 year old Amana top-loading washer, and are using the recommended amount of Purex liquid detergent. The washer has a corrugated flexible drain hose, with 1 1/8" diameter end that fits 5" into the waste pipe.

I tried to snake the waste line but the snake will not make the bend at the bottom of the wall (about 3-3.5'). I also tried a clean-out that is about 1' from the drain line (the snake went in a good 15' and came out clean). I suppose the cleanout is in the vent line, upstream of the drain line.

It seems the drain takes the water (both wash & rinse) but then fills up with suds at the end of the spin cycle. Other than reducing the amount of detergent, is there anything we can do?

  • If you can't get the snake to go down the drain, I'd try a different snake or technique until one does or you find a clog. – BMitch Oct 31 '14 at 18:59
  • There are low-suds detergents. In general, suds are only useful when hand-washing anyway, since their going flat indicates that you're using up the surfactant and need more to fully dissolve the oils you're trying to remove. In a machine, where you aren't watching the process, they serve no purpose. – keshlam Nov 3 '14 at 13:30

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