DW drain is breaking trap seal

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dk4dk4

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After the dishwasher drain cycle I can smell gas in the sink area. The trap seal must be getting broke by the drain cycle of the DW allowing gases to come up into sink(s). Can anyone spot anything wrong in the picture?
 

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hj

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Unless there is a problem with the piping inside the wall, it is NOT breaking the trap seal. But, odors are very subjective and what you THINK you smell may NOT BE what is is or where it is coming from.
 

dk4dk4

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well if we run water in the sink after we notice the smell that fixes the issue. So I'm not sure what else we'd be smelling?
 

hj

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1. If the pipe in the wall is proper, NOTHING would "siphon" the trap
2. Even if the pipe is improperly installed, it would be a "reach" for the DW drain to EVER siphon the trap
 

FullySprinklered

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I've never done a sink quite like that myself. I use slip joint fittings to the greatest extent possible; the glue-up style is much harder to service when something goes wrong. I don't see anything there that would indicate a siphoning issue. I've installed that type of sink basket before, but it's not common in my experience. It could be that they are accumulating some kind of guff in the body of the drain fitting and the stink thereof is getting blasted back into the room when the dishwasher spins out. Only thing I can see. Work on it with some chlorine bleach and see if that helps.
 

Plumber69

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I've never done a sink quite like that myself. I use slip joint fittings to the greatest extent possible; the glue-up style is much harder to service when something goes wrong. I don't see anything there that would indicate a siphoning issue. I've installed that type of sink basket before, but it's not common in my experience. It could be that they are accumulating some kind of guff in the body of the drain fitting and the stink thereof is getting blasted back into the room when the dishwasher spins out. Only thing I can see. Work on it with some chlorine bleach and see if that helps.
Most sinks people order now are coming with those plastic basket strainers. At least where I live
 

Dj2

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It's hard to tell from the picture, but is the wall drain connection higher than the horizontal piece between the sinks?
 

dk4dk4

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The wall connection and the horizontal piece between the sinks are of equal height.
 
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