I have a system that is on a slope. When the zone is off the water drains out of the lines and heads. The system works fine when it is fully pressured up. The problem is that I have to run two programs (on the controller box) to get them to operate properly. What I do is run the zone for about 2-3 minutes to put water into the lines and then shut it off for 3 minutes to let the pump get up to full pressure again and then start it up again. I believe the reason it works this way is because the sy...
