My boiler has a backflow preventer that is dripping pretty steadily from the downpipe.
I think I can manage a replacement, but just wanted to make sure I'm looking at the right part and that this is in fact the correct course of action, replacing this backflow preventer.
Is this a suitable replacement part? https://www.homedepot.com/p/Watts-1...cuum-Breaker-with-Solder-Ends-9DSM3/100544847
And am I right in assuming this is a wrench job? I don't mind sweating pipes but it looks like I can maybe keep the existing threaded connections.
The leak started after I had to shut off the main supply to the house briefly. There was no leak before the shut-off, and after the water was turned back on, the backflow preventer was leaking. Why would a temporary shut-off of the main water supply trigger this leak?