Johnson Tee clog

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A_Marmot

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Does anyone have advice for unclogging a Johnson Tee dishwasher drain? The air vent on the exterior wall is clear, and I've traced the clog to somewhere between the wall connection and sewer. I'm looking for an approach that does not involve opening floor and/or wall...
 

Terry

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The Johnson tee has a 1.5" standpipe into a p-trap. The only way to snake that would be through the 3/4" that the cap goes over.
Or if worse comes to worse, you can run the dishwasher hose to the disposer or a DW tee below the sink.

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