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Question DetailsAsked on 8/4/2014

How much should it cost to replace kitchen sink drain pipe in wall?

After running the water in the kitchen sink I noticed water dripping in the basement near the main sewer line. There is no leaking when I run the water in the bath, sink or flush the toilet upstairs. Approximately how much should it cost to replace the drain pipe from the kitchen sink to the main sewer line in the wall? The pipe is approximately 5-6 ft maximum.

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1 Answer


First, pull out everything under your sink and make sure it is not just water from a leak under the sink, or coming from the underside of the faucet, from the spray nozzle or dishwasher discharge hose or garbage disposal, or from faucet leakage at the handle area running down behind the faucet and sink. That type of repair (excluding any damaged drywall or wood) would typically be a couple to few hundred $ repair by a plumber, assuming garbage disposal or faucet does not need replacement because of wear or corrosion.

Now, to the drain pipe - if in the wall, highly likely the problem is only at a joint, not the pipe itself, unless galvanized steel pipe. So, again, not including any repair of openings (which can add a few hundred $), typcially $200-300 range - hundred or two more typically if embedded in a "chase" (enclosed passage) in concrete or brick wall.

If entire piece of pipe has to come out, then sometimes the least intrusive way to do that (especially if no open basement or crawl space the pipe can be fed up from through a hole in the floor sheathing) is to remove the sink and put a new piece down from the top through the sink hole, then replace the sink, so total cost can run up into the $500 range in that case, plus any drywall repair and painting.

Your contractor category in Search the List is, obviously, Plumbing.

Answered 6 years ago by LCD

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