Sounds like shower valve need rebuilt or replaced. If it’s one that has handle that sweeps back and forth it has o-rings and springs to control setting. I guessing when sprinkler system running it’s causing surge/fluctuation in water pressure as it runs through zones. This surge probably cause if spring unloads seats/ o-ring to leak?
Last edited by Topspinmo; 04-22-2024 at 04:18 PM.
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