I hope you will get a response! My watts backflow preventer is leaking. It appears to be a slow leak from the relief valve, then run around the unit where it drips off the bottom. Before re-installing (for the second time), I tried to undo the nuts and take a look inside, but they would not budge!! I don't know if I have the unit screwed on too tight at the connections at either end, if I need a new O ring, or what..... I just can't afford a repairman right now....
