My home has pressure regulator installed immediately right after main water shutoff. It appears defective on testing water pressure, with result > 80 PSI. Looks rusted with lime too? So if replacing it, just wanted to confirm that shutting off main water shutoff is good enough, or do you have to contact water service to stop service while changing out the regulator?
The piping by main water shutoff and regulator was extended with a T to branch into home with a secondary shutoff knob along with another branch that feeds into sprinkler system. Whoever did the sprinkler piping did crappy job to space it so close to incoming water supply line where regulator is. So as a result of changing regulator, assume to avoid damage and make better in future, perhaps redo part of the PVC sprinkler piping?
See reference photos
I was thinking of keeping the underground sprinkler pipes intact, and just branch out the visible PVC from being a straight vertical pipe to be a like an N shape (but diagonal line is horizontal, like a tetris piece) so that the top portion is spaced farther away to the right, to have room for future replacement of pressure regulator. That an acceptable piping redesign?
And I've never worked with PVC plumbing before, are the pipes permanently connected with adhesive or you can actually "unscrew" them to disconnect as they don't appear to have threads like metal piping? So would I need to cut the pipe in the middle with a pipe cutter (if can't otherwise dismantle PVC pipe) and branch from there? As a novice I am hoping to reconnect the PVC piping in new shape using Shark Bite parts so that they're easy to connect and disconnect.