Plumbing: kitchen sink PVC pipe loose

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rscole86

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#312324 6-Apr-2024 14:06

Looking for advice on whether I should replace or could get away with thread tape on the waste/trap under the kitchen sink.

I can tighten the top nut it to the bottom of the sink, but just when it's getting firm it jumps on the thread. I'm guessing it also loosens from bumps/knocks to the pipes as I woke to a partially flooded floor in the morning, after the dishwasher was going overnight.

It looks like I would need this, if I went down the replacement route.

shim99

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#3215084 6-Apr-2024 15:15

Probably worth undoing the top and checking the silicone washer. Might just need a replacement washer. They can deform over time.

vexxxboy

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#3215141 6-Apr-2024 18:18

they are under $20 so i would just replace it, no plumber needed

Common sense is not as common as you think.

larknz

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#3215171 6-Apr-2024 21:23

I would unscrew and then screw it up again it make sure it isn't cross threaded.

itxtme

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#3215177 6-Apr-2024 22:26

As above, I would be surprised if it wasnt slightly loose. As a drain if it has backed up at any point and has water sitting there it will escape if not water tight. Also thread tape is not appropriate for these compression fittings, the rubber washer does the compressing, and you can see the waster has escaped from above the thread.

Clean it first (so you can see if it occurs again), then try tightening it, and that will be job done.

rscole86

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#3218879 16-Apr-2024 08:54

Thanks everyone.

Turns out the part I linked to is not compatible, as I needed the entire FlexiTrap system, which it doesn't look like you can get spares for.

In the end I just loosened the top and bottom joint, tightened the top first (that's the one that was leaking) then adjusted the telescope section before tightening the bottom nut.