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Old 10-02-2010, 08:46 PM   #1
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got spray-in foam in drain pipe - suggestions?


Hi,
I have a washing machine with the typical in-wall drain. In an effort to seal up the place for winter, I stupidly squirted some spray-in foam around the drain tube where in hook into the wall drain. Got some down the pipe, apparently. Now the drain is slow and can't accept all the water coming out during the spin cycle, so it squirts all over.

I'd rather not open the wall and cut/replace the drain, expensive and time consuming. Would rather throw something in there to dissolve the foam insulation without melting my PVC pipes. Is there such a thing?

Thanks for any thoughts. Already tried the regular drain de-clogger to no avail.

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Old 10-02-2010, 09:39 PM   #2
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got spray-in foam in drain pipe - suggestions?


( just guessing)

I bet you can chisel/cut/abraid/file the stuff to bits and suck out debris with a lenght of garden hose duct taped to a wetvac.

Ideas for cutting instruments include a hacksaw blade tightly taped to a scrap of 14/2 electrical cable, and one of those bristle brushes plumbers use for cleaning inside copper fittings epoxied onto the end of a flexible wand for venetian blinds. If you drop something else in there, so what, you'd have to open the wall to access the trap anyway. But don't send any more water down if you try this. Instead vaccuum out the foam bits.
Worst thing that can happen is you create leak in pipe and don't find out until much ($) later. So be gentle

Do you know about those plastic plumbing access hatches? If you have to cut into the wall anyway, might as well provide a trap access hatch in case something else gets in there later.

Steve El

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Old 10-02-2010, 10:27 PM   #3
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got spray-in foam in drain pipe - suggestions?


I'd refrain from using more chemicals.I think the spray foam would float on top of the trap water and the regular drain de-clogger is now on top of the foam.Try steveel's ideas with rubber gloves on.
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Old 10-03-2010, 08:36 AM   #4
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got spray-in foam in drain pipe - suggestions?


good point. Glasses too.
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Old 10-03-2010, 10:34 AM   #5
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got spray-in foam in drain pipe - suggestions?


Plumber's snake?
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Old 10-03-2010, 12:09 PM   #6
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got spray-in foam in drain pipe - suggestions?


yea that foam is pretty chemical resistant,the only things that affect it are things you definatly don't want going into a drain,mechanical removal is your only option

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