Hi. Appreciate your insights.

Our kitchen sink started draining very slowly about a week ago. This morning I cleaned out the P-trap and used a shop vaccum to suck out the pipe into the wall, right where the P-trap connects to it. It sucked a LOT of gunk into the vacuum tub.

I put everything back together and ran the water for a long time into the sink. It drained beautifully, no stoppage, no slowing, like brand new. I then ran water into the other side of the sink and turned on the garbage disposal. I instantly had thick gunky water backing up into both sides of the sink. The condition is now as before, almost no drainage on either side.

What should I do? I'm stumped.

Thank You,
EG

 

Garbage disposals are a great way to clog sinks when people put things down the drain that ought to go in a waste basket.

Without a photo of how the sinks are plumbed we are only guessing. It's possible that you need to snake the drain beyond the trap. Either the disposal pumped more waste into the line and plugged it or your double sink is relying on the 2nd sink as a vent because your existing vent is plugged or the line is running slow enough that the vent is blocked.