I had a sprinkler system installed last year in Mass. I turned on the system yesterday and the pipe that comes out of the house that goes into the backflow blew. Water was going everywhere including through the hole in my house they used to run the pipe through to the outside. I thought that was supposed to be sealed. Anyway back to the pipe, when I went outside the seal broke and not the pipe. I had a plumber look at it and he said the installation was wrong as they solder a street 90 copper into the backflow that is 1" threaded. I was told a male adapter was supposed to go into the female threaded of the backflow and those two straight copper pieces should have been solder and not a straight to a threaded. Is this true? I have a picture but can't seem to upload on here but can email it to anybody who would like to see. I called my GC, plumber, irrigation company and they are all pointing the finger at each other. I was told it's not more of a warranty issue than an improper installation. I still don't understand why the town inspector signed off on it. Any information anyone can give me would help me if I have a say or fight in this. They are saying they aren't sure they can get the solder out of the threads of the backflow and I might have to purchase a new one but I don't see why I should inherit that cost as I paid for it once already 10 months ago. Thank you for any help.