I have recently put in an outdoor sprinkler system in and when I turn on the zones I am getting water coming out of the backflow preventer.
This only happens when the valves are first open and it does not happen on every zone.
The device is more than the 12" above valves and sprinklers.
My water supply lines are 1/2" and I convert to 3/4". I have 1/2" coming out of the backflow and down the wall and convert to 3/4" at the bottom where I make the bend.
My sprinkler lines do run downhill (we have a downhill slope so I don't see how Icould have avioded this) and the lines themselves drain after shutting off the zone.
What is happening and how might I correct the problem.
I am concerned because I am getting knocking in the lines when this occurs.
This only happens when the valves are first open and it does not happen on every zone.
The device is more than the 12" above valves and sprinklers.
My water supply lines are 1/2" and I convert to 3/4". I have 1/2" coming out of the backflow and down the wall and convert to 3/4" at the bottom where I make the bend.
My sprinkler lines do run downhill (we have a downhill slope so I don't see how Icould have avioded this) and the lines themselves drain after shutting off the zone.
What is happening and how might I correct the problem.
I am concerned because I am getting knocking in the lines when this occurs.