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Question DetailsAsked on 2/25/2015

How much should it cost to replace basket strainer and drain pipe under kitchen sink?

The drain pipe under kitchen sink could be leaking due to a new kitchen countertop being installed recently. Can it be repaired instead of replaced?

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1 Answer


The strainer is part of the sink - should not need replacement. The pipes and garbage disposal fasten on below that, unless you have a real weird sink. Actually, highly unlikely anything needs replacement - probably just a loose or poorly made up connection.

My guess - a LOT of people, including many countertop people and even some plumbers, don't know that the strainer fitting, which is typically stainless and fits down into a recess in the bottom of the sink, is supposed to be sealed with plumbers dope (an oil soaked clay that acts as a sealer and is longer-lasting that caulk or silicone sealant in hot water and detergent environments), with the excess wiped off after it is tightened down with the mounting hub nut underneath. Ditto to garbage disposal mating surface if a flange-type as opposed to piped.

I would suspect they took the sink out when putting in the countertop (certainly if top-mount as opposed to undermount type sink) and they either failed to use plumbers putty (plumbers dope) when they put the strainer back in, failed to tighten down the hub nut connecting the piping to the drain, or did a poor job of mating up the garbage disposal and tightening it up to the sink or countertop mountings. I would call the countertop people back to fix it - should be about 5-20 minute job - shorter timeframe if leaking hub nut or pipe or failed to dope the strainer mating surface, longer timeframe if have to drop the garbage disposal to fix the above.

Answered 5 years ago by LCD

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