Took this picture tonite when I was cruising around town tonite. (Just had to take this pic so I quickly ran home and got the camera) The mainline appeared to be 3/4", with ONE AVB(your supposed to have one for every valve!) really low pressure, 8 heads on a zone. This is one of the Hunter's older versions of the PGP, I believe. Worst part yet is where this head is located. As you can see the system is so low in pressure that the wiper seal on the head isn't even activating. I think I should put a system check over flyer on their door.