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Troubleshooting a Leaking Sprinkler When System is Off
Tags:
Troubleshooting, Valves, Diaphragm, Solenoid, Check Valve, Sprinklers
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Leaking sprinklers generally do not have anything to do with the sprinkler. The problem is from water in the pipe after the sprinkler system has been shut off or a problem with the valve. Here are the main causes and the solutions:
A. Water in the pipe is draining out of the sprinkler: Water naturally flows to the lowest point in the line. If you have a slope in a line then the water will drain out of the lowest sprinkler and flood the area every time you turn off your sprinklers. This over watering can create swampy conditions around that head.
Solution: To prevent this you need to install a check valve on the sprinkler. They are made by all manufacturers and come in the size of your sprinkler. Check valves prevent the water from flowing through the sprinkler once the valve has been turned off. If you install a check valve then you will have to blow out your system when winterizing it.
B. Valve Diaphragm is damaged or dirty: The second cause deals with the valve. To fix the problem you need to take apart the valve and rinse off the components or replace them. Installing a Check Valve in the leaking sprinkler will not fix the problem as it will just cause the water to leak out of the next lowest head. Here is the list of things to look for:
WARNING: TURN OFF WATER MAIN BEFORE TAKING YOUR VALVE APART!
- Rock or debris under the diaphragm
- Solution: Rinse off diaphragm and quickly flush system before putting parts back together. This will clean out debris that may have fallen into valve or pipe.
- Debris under the solenoid
- Solution: Take off solenoid. PLUNGER AND SPRING MAY NOT BE ATTACHED TO THE SOLENOID AND WILL EASILY GET LOST. Rinse parts. Quickly flush system and then put parts back together.
- Worn out or damaged diaphragm
- Solution: Replace the diaphragm.
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