Wondering if anyone here installed a pressure thingie after the city installed the backflow devices on their water meter (has the city actually done this?). What does the pressure thing actually do? We're having some plumbing issues (when the tub drains water bubbles up in the other toilet and kitchen sink--ew) but I think they are related to a willow tree next door. A year ago we had the lines snaked and they found lots of roots. Today water came out from under the toilet (that Gene's plumbing removed and re-installed when they snaked the line) when I drained the tub--not good! I will check the plumber reference list here and on JP but if anyone has any suggestions for a good plumber, I'd be happy to have a recommendation. Prefer not to use Gene again as the guy he sent out actually ended up taking money from a friend that I referred him to and didn't complete the work (moonlighting, I guess). Advice anyone?