garbage disposal plumbing
Posted by Marde on June 25, 2001 at 12:49:36:
Is it necessary to have two p-traps for a garbage disposal installed under a double sink? After installation with only one trap on the non-disposal side of sink, my drains are backing up on me. The instruction that come with the unit says to use two but the guy who installed it didn't read them and now will not admit that maybe he screwed up. Did he?

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