msteger Posted January 26, 2010 Report Share Posted January 26, 2010 I know the plumbing code forbids double traps, but why exactly? Does having two traps in series allow for easier siphoning or what? I am drawing a blank. This morning, the dual kitchen sink had a trap in the drain line that both sinks drained to, but under one sink was also a garbage disposal. The drain line coming out of the disposal immediately went into a trap, then ran laterally to meet the other sink's drain, and then they went into the common trap. Quote Link to comment Share on other sites More sharing options...
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