I replaced the pressure gauge, not once, but twice with no success. I even had a spare gauge and the new ones are all functioning the same. The needles are bouncing all over the place. I used Teflon tape and did not over tighten. There is no water dripping from the Multi-Port.
Is there air in the system? How do I know? The returns are fine. Could it be the rotating heads create some sort of air movement in the system. Pressure is at 14 psi. I put the old Hayward gauge as that one did not bounce around anywhere near as much as the new ones.