How many heads are in the pool, and how many heads per circuit.

25 heads with 3-5 per circuit.

Sounds like the heads are bad, a 3/4 hp with 3 to 5 heads each will not cause them to seperate. Call your PB and have them replace the ones that are coming off.

Heads are fine, caps had a crack so just those need to be replaced. Each head came with 3 caps of different size but PB walked away with those that weren't used; need to get those back.

The might have put too small of caps on them.

with 3-4 heads per circuit they probably should use the medium sized one that comes with the heads.

The pressure is way too high for a system with this many heads on this size of pump.

If you look in the upper left hand corner of your PV3 design it tells you what size heads to use in each zone. Zone 1 should have 3 heads, all with 5/8" orifices. On our pool, the builder just put the same size on every head. I had to make them come out and change them out for the right head.

Yes, they definitely put the wrong size heads on for some of these. Why is it so hard to do this right?

My 6 port valve housing is cracked too.

Oh, and the PVC joints to the 6-port valve housing where leaking so all that plumbing had to be redone.

Not impressed with the plumbing job on my pool.

They are being very responsive though to get everything fixed properly.

The other lines for the skimmer/filter/returns seem to be fine though. Skimmer action is good and no air in the lines.