I have in ground paramount 6 module.
When I start the pump all heads pop up, but only 3 out of five get pressure.
On the valve pressure gauage does not move (may be bad).
When I shut off pump all heads go down so there is some movement.
I took out the value & washed it couple of times, also tried moving plastic circles they are free. Its about 6 year old.
DO I need to replace or any fixes available ?