I have about 30 psi (I think) powering 4 Rainbird 600 pop up spray heads. It's only 1 zone as I have a tiny yard. I have to "assist" the pop ups to come up when the water goes on and after that they work great! i know I don't have any debris in the line or the sprinker heads. If there is enough pressure for them to stay up after I "help" them up, does that mean there is enough pressure to pop them up. They are brand new heads. I'm wondering if another brand (orbit or toro) would have less tensio...
