You must be somewhat of an appraiser and deal finder. It takes time to recruit your cosmetologists, but you will run across them in your travels. Friends and family usually trustworthy drain leak repair can provide you with some serious leads. Start networking and talking to tradesmen. Get their numbers and schedule them to descend upon your ugly duckling at certain times and watch the transformation begin.
Ask how long they have been in the business - This is a very important question to ask your tradesman as you would know how much experience he or she has. You could ask for pictures of previous work, user reviews and qualifications. Ask if he has received and certificate and awards from trade bodies or plumbing bodies.
It would be good to have a couple of people around while the process is being done just in case there are accidents since acid is a very local water heater repair service hazardous substance.
This is simple, just boil water on the stove, pour and run this hot water on your kitchen sink before you plunge. Do this repeatedly until you unclog the sink.
Last but not least is don't hire someone just because they gave you the lowest bid. Next don't hire some handyman that does odd clog jobs, in some cases they can cause you more problems that down the road it will cost you more money to fix what these handyman broke or did wrong. Sometimes the lowest bid is going to cut corners and not do the job right or when they get there and start doing the work, they keep saying they are finding more and more wrong and you end up spending more than what you should have.
Swimming: The chlorine in swimming pools can do extensive damage to your jewelry. Chlorine can pit and discolor gold, as well as take the polish off of precious gems. Chlorine will also do damage to settings, causing gems to come loose, and greatly increasing the risk of losing them.
Finally, at the beginning, take the time to get quotes from several plumbers and potentially on non-emergency, lower cost jobs. Get a feel for the plumbing company and see how well they fit with your needs. Meet the plumbers in person. Then, when an emergency plumbing problem arrives, you will have a much better solution when time is of the essence.