SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

I've got 3 valves in manifold that sprinkle 3 areas in my backyard. The left and right valves work quietly. The middle valve makes an incredible amount of noise and seems to vibrate all of the pipes in the house!

Here's an image of the manifold

I've tried to fix the middle valve, but haven't figured it out yet:1) I checked for crud inside the middle sprinkler. Couldn't find anything
2) I replaced the solenoid, thinking that maybe it was problematic. No change
3) I swapped the whole top units of the left valve and the middle valve and the left valve was still quiet and the middle valve still noise.

So, I've got to assume it's lower down in the middle valve. I'm kind of assuming I need to replace the whole manifold... but wanted to see if any of the experts in this forum had any good ideas.Thank you very much in advance!
John

Thanks mrfixit.I swapped the valve heads (which included the
solenoid and wires) between the left one and the middle one. So at this
point, the middle one is on a new channel on the controller, has new
wires, and a new top half, including solenoid and lead wires.
Unfortunately, it's still noisy! The left one isn't noisy, so it seems
like it may not be wiring. Have you ever seen where it might be pipes
that are too close together or a loose pipe fitting or something else?

Thank you!

Thanks mrfixit and Wet_Boots.Here's a short video of the sound it makes. This is before I flushed it this morning: https://imgur.com/a/jYPbmZoAt the start it's just a water noise, then 6 seconds in, you hear a vibration then at 8 seconds it's the vibration

Here are some photos of the valve head after I took it apart and flushed it: https://imgur.com/a/WyrdNLB
Finally,
in this short video (https://imgur.com/a/l0Xwklp) you can here the
noise and then what happens if I hold the valve head. As you can see,
the vibration stops.
I tried fully opening the supply valve and restricting it and it made no difference.Essentially, my band aid solution is to stick
some foam between the valve head and the wall but ultimately I'd love to
figure out what's going on and how to fix the valve head!
Thank you again!