A: Thanks for the vote of confidence, Bob. I do have some great advice for you on both questions. First, you are correct that even after you drain out water lines, there is still a lot of moisture left in the pipes. When you heat the pipes with the torc, that moisture is converted into steam and, unless you have a place for the steam to escape, two things can happen. Number one is the expanding steam can separate the new fittings from the pipe or — worse yet — move the fittings enough to create an inferior joint. Number two, because of the trapped moisture, the pipe and fitting may not get hot enough to "run" the solder.

This is why I always recommend calling in a licensed plumber to do any soldering work. A licensed plumber will know that you need to open any valves down line to release the steam vapors or to use "vent couplings" when soldering to existing lines. Vent couplings have a built-in, screw-on vent cap that allows the steam to escape. Like all soldering, working with vent couplings requires knowing all the proper safety procedures and should be done only by a licensed plumber. The fact that you are not familiar with all the soldering techniques points out to me that you will benefit from calling in a plumber to finish this job.

However, the second part of your question — about how to slow down trap evaporation when you leave your home for winter — is something you should be able to do yourself. Home centers sell a product for winterizing homes, boats and trailers that basically is a "non-toxic" antifreeze that you pour down the drain to seal the traps. See your local supply house sales people for specific product details, instructions and information. I have had very good success with plumbing winterizing products like these in the past, and come spring time, you simple turn on the fixture and the trap flushes out with water. Make sure the product you buy is also eco-friendly because we all need to be aware of what we put down our drains.

Good luck with your sink and good luck in Florida. Someday I'd love to worry about how I'll be able to winterize my house while I'm away enjoying a tropical climate. Until then, all I'm worried about now is getting a new snow shovel. So, even with your sink problems, I think I'm the one who should be asking you for advice!