Question
I recently installed a single station drip system. I used an anti-siphon valve and a pressure regulator feeding my 1/2 inch tubing. Everything worked fine for a month. Now there seems to be low pressure flow at all drippers. The hose pressure and the out side faucet pressure seems to have normal pressure. Could the anti-siphon valve be the issue? Any suggestions would be appreciated.
Thank you in advance.
Al

Answer
Hey Al, I hope this helps. I would suspect the pressure regulator is the problem. Normally if it is the anti-syphon valve, it would actually leak or port water out of the plunger assembly. If it was me, I would take the pressure regulator off first, then turn on the valve, and see if you have good pressure. If you do, replace the pressure regulstor, if not, check for a restriction in the anti-syphon valve. Let me know if I can be of anymore help, thanks and have a great day.