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How to Install Dual Kitchen Sink Drain Plumbing Pipes



In this video we show you How to Install Dual Kitchen Sink Drain Plumbing Pipes under kitchen sinks. Dual kitchen sink plumbing can be quite tricky and you …

Verona NJ Plumber

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12 Comments

  • The issue I learnt with that was that the traps are connected before the vent so if you fill one sink and empty it you might siphon the other trap, up here we cant do that but states differ

  • The outlet side of the traps are supposed to be sealed by a glued connection, not a slip fit. You should have put desancos on the tailpieces. Also 2 traps are not required, if your drain from the wall was lower you could have put a TY above the trap on the disposal.

  • Mine is similar to the Y design in this video but is different with how the two basins connect to the Y. I took it all apart to fix a clog and can't get the garbage disposal side back together now. Should have taken a picture of the layout before hand but didn't think of it until after. New homeowner pains and lessons.

  • The joint that connects the two halves of the trap is known as a VGJ or visible ground joint . There has also been some very shoddy work done in the process of remodeling the piping for the sink drain. There should be absolutely no water left in the horizontal pipe that goes to the wall. There isn't a jurisdiction in in the U.S.A. where that quality or lack of workmanship would pass a plumbing inspection. I only hope the person who lives in that house knows what kind of work was done. ( 55 year retired plumber )

  • You can do a center waste on a sink with 2 basket stainers (without garbage disposal) without any issues. However center waste with a disposal doesn't work too well because food and waste gets caught on the diverters inside of the center waste tee and clogs up. Also not a fan of wet/dry glue used under a sink. It's messy most of the time. Clear primer is what I use with clear glue. Most of time inspectors won't say anything about it because it's visible plumbing. But they will fail you if you don't use purple on the underground.

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