Hello professional plumbers or anyone else who may have a solution to this problem.

I just installed a MOEN Banbury faucet # 84945 which comes with a push-down drain. The tapered rubber washer supplied with that drain has very little taper and is not making a good seal with the drain hole in my sink allowing water to escape at that point.

I am planning to add some plumber’s putty between that rubber seal and the sink but would appreciate hearing from the experts as to what may be a better way to handle this problem.

Thanks in advance for your help.

I don't use the factory supplied gaskets and use clear silicone instead.

Never had a leak.

Drain (part M) is designed for a flat outlet basin.

Gasket (part N) is the same.

Sounds like you have a TAPERED sink outlet.

I would try plumbers putty as the sealant without the gasket.

Do not let the drain rotate when you make up the bottom (Mack) washer.


OR


Get a METAL drain assembly designed for a tapered outlet basin.

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

My basin has a flat outlet that is very smooth but running a finger inside the drain hole I can feel a very slight chip in the porcelain. I packed a large amount of putty around the opening especially in the area of the chip. That appeared to have stopped the leak but it began anew after about 20 minutes

I’ll take it apart, remove all the putty, and take some careful measurements before going to my local Home Depot tomorrow in search of a new MACK washer.

Will also pick up some clear silicone sealant.

if the 'chip' is on the bottom of the bowl where the Mack washer sits/seals it MUST be repaired using plumbers epoxy

OR

the nut retaining the Mack washer will need to be REALLY REALLY tightened risking cracking/breaking something

OR

get a new GOOD fixture

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

Can such a repair be done without removing the basin from the vanity?

Use clear silicone around sink flange and mack gasket.

Work fast and tool silicone for nice look and you'll be GOOD to go.

yes, as long as surface is DRY - clean with alcohol first


but


try Curly's way first



good luck

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

I bought a cartridge of GE kitchen and bath, 30 minute water ready clear silicone, and applied a large amount to both the drain flange and the Mack washer.

I waited 24 hours before testing, and removed the drain plug so a funnel could be placed under the faucet spout. That took the drain flange out of the equation so I would at least know that any leak was from the area of the Mack washer.

Very happy to say that there was no leak at all. I removed the funnel, replaced the drain plug, and opened the water for several minutes. Once again no leaks were found.

This is the first time I have used silicone sealant for installing a drain plug.

Would it be advisable to apply a second layer of sealant in the area of the Mack washer?

No.

You are good to go.

Generally speaking new silicone will not stick well to silicone already dried.

I used to just use plumbers putty and occasionally would have a leak. Tried silicone and no more leaks.

One drawback to silicone is that it is a little more work to remove it done the road. I find it worth it.

Good Job !

Thank you for your reply. Many thanks also to you and Bernabeu for your help with this annoying problem.

Paul



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