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Question:

Should a plumber remove a bathroom sink to check a leak FIRST before buying a LOT of pipes?

He said that I need to replace the pipes under the bathroom sink because they were old and made of copper. He showed me where the leak was coming from BUT wind up replacing all the copper tubing under the sink! After he finished and left. I turned the water on to wash the sink out and water started gushing out the sink worse than before! Called him back and he then removed the sink and found a small hole in the metal sink. He told me that he could put a bandage on the sink to stop the leak. He used the J B Weld on the sink. I have not tried it to see if the leak has stopped. My question is this: Why didn‘t he take the sink out FIRST to see if it was leaking instead of having me buy all these pipes? I am now stuck with stuff that he did not use (a long plastic pipe that he cut, some screws, other piece of pipe, etc.)! He said that I have to pay him for this additional repair to the sink. I am so angry because had he took the sink out initially, he would have found the hole in the sink. Am I wrong or what?

Answer:

Hi sorry about your troubles.Im a not a plumber by trade but common sense tells me the first thing you do to find that type of leak is to first run some water in the sink with the stopper in and look for leaks there and if no leaks found there then check the lines and drains
What you are looking for is a dielectric coupling or dielectric union. You can get one at any decent hardware or plumbing supply. The dielectric coupling isolates the two metals from each other to prevent corrosion through electrolosis. Yes, this is a DIY job.
there is an adapter but you may find it impossible to find try regular plumbing supply houses.as far as diy if you have knowledge of plumbing you could try this it's not to difficult.Mueller co. has this adapter in there catalog under service fittings.
You do the common fix first before you look for the strange. Sinks seldom have holes in them, usually it is the pipes. It is hard to tell where water comes from sometimes and the water probably followed the pipe making it look like a leaky pipe which is very common. The bad thing is he did not check his work after he put in the pipes. I have fixed all kinds of things over the years and I always start with the most common thing first. 90% of the time I am right.
First, old copper pipes is probably a lie. Copper pipes are still being installed in bathrooms today. Second, when you hire someone to do a repair, it is their responsibility to actually do the repair in a good workmanlike manner, the implied covenant of quality work. If they fail to repair properly the first time, it's not your fault and they should come back and do it properly. Charging you extra for anything that was not necessary for the repair is a type of fraud. You generally cannot be asked to pay for anything you did not ask them to do; i.e., repairing something that wasn't actually the broken part. A good repairman who discovers something like this should tell you when they MUST replace something non-broken as part of the repairs, since some things just can't be re-used during the repairs. That would be part of the negotiation of the price: I'll have to replace that entire faucet set, not just the washers, so it's going to be $90 in parts, not $3. So, you can ask your plumber why he thinks you need to pay him more than about $5 for the JB Weld he should have done in the first place, and ask for a refund on the pointless work of replacing anything not related to the leak you wanted repaired. Add: I had one where a brand new sink was leaking into the basement. The plumber who did the original installation thought it might be a bad crimp on one of the plastic joints so he cut open the back of the cabinet and the plaster and cut out a piece of pex and spliced in a new one. Turned out that a trapped mouse had chewed a hole into the pex tubing inside the wall and the dead mouse was still in there! The plumber charged us $40 for his time and materials.

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