Low Water Pressure Irrigation System?
Just installed an anti-siphon valve and brass shut-ff valve.
2. Three zones are getting water (not worried about the fourth), but the flow is very poor and none of the heads bother to pop up much.
3. I don't use the solenoid in the pic, but I do rotate it CCW to open up the valve there. The arrow next to the brass valve shows the direction of water flow.
Q: What is happening? Is the water valve causing a restriction? This low pressure never happened before.
It had nothing to do with the anti-siphon valve or shut-off valve. The 4 valve solenoids on the ground were not tight enough, and were "stealing" some of the pressure off of a fully turned solenoid in another valve. The pressure in one zone was being slightly offset by other solenoids that were slightly loose. I removed the four solenoids, cleaned them, then reinstalled them to get a tight fit. Dirt through the years had accumulated in the solenoid threads that prevented a tight fit.
- EarleenLv 68 months ago
How many sprinklers are you serving with that valve? Cap off some of the sprinklers and see it the others will work right. About 3 or 4 sprinklers is full capacity for a residential system. You might have a mix-matched system.
- Spock (rhp)Lv 78 months ago
if the valve is too small, it will reduce the pressure at the heads, yes. it also will reduce the volume of flowSource(s): grampa