When any one zone of the sprinkler system turns on, the water pressure inside the house drops to zero (no water coming out of the faucet) for a 3-7 seconds before returning to normal. After that drop, both the sprinklers and inside faucets/showers work fine until the next zone turns on, then the water pressure inside the home drops again. PSI measured at the main valve is 55 (after the pressure regulator). I have low flow sprinkler heads installed, and fairly small zones. Any ideas on what could be the issue?
Water pressure inside house drops to zero when sprinklers are on
sprinkler-systemwater
Best Answer
I don't think you have a leak, what I believe is your pressure regulator is set at a high enough pressure that when the zone turns on and has a high surge until the pressure builds this is causing the no flow in the house for a few seconds. Once the flow stabilizes the pressure builds back up and you have pressure in the house again. To keep this from happening install a regulator on your sprinkler system and set it to a slightly lower pressure than what you want in the house. This will make set sprinkler lines take slightly longer to fill and if 2 psi lower will slightly reduce the water spray distance but your pressure would not drop as it is doing now.