When my sprinklers come on, I lose regulation and I could use some help diagnosing the problem.
My regulator is a Watts ND 35. The inlet pipe is 3/4". The regulator adjusts the pressure, and seems fine. My sprinklers take 22 GPM because I have 17 heads on one line. I know that's a lot, but I don't have much choice at the moment. My sprinklers want 30 PSI. I have a hose nipple right between my regulator and the sprinklers, so I attached my pressure gauge there. If I adjust the regulator for 30 PSI when the sprinklers are on, the pressure goes up to 65 psi when I turn the sprinklers off. If I set the regulator for 50 psi, I don't have enough pressure to pop up the sprinklers.
Can I fix this problem by changing the regulator?