HOW TO REPLACE A SPRINKLER VALVE DIAPHRAGM



Leaky sprinklers can be caused for many reasons.  A broken diaphragm is one of the most common.  Syptoms of this are sprinkler heards dripping water after they've been turned off or soggy ground surrounding sprinklers at the end of a line.  However, Orbit jar top valves make replacement quick and easy.  

Step 1


Locate the problem valve
Locate the problem valve
This step will take a little investigative work.  You'll need to determine which valve is causing the problem.  An easy way to do this if you're unsure, is  to run each zone for a minute and take note of which valve turns on the sprinklers that are leaking.  This is the valve we want to focus on.

Step 2


Turn off the main water supply
Turn off the main water supply
Before beginning any repairs, turn off the water to the sprinklers.  Otherwise you'll get a face full of water.

Step 3


Remove the top of the valve
Remove the top of the valve
Orbit's jar top valves unscrew by twisting the top off (like a jar top).  Other vavles are screwed into place and will require a philips screwdriver to repair.  Eitehr way, open the top of the valve and remove the broken diaphragm.  There is also a spring inside, which you must take special care not to lose or damage.  

Step 4


Check for debris
Check for debris
Sometimes the diaphragm isn't broken, it's just being blocked from closing all the way by some kind of obstruction.  Check for these, they should be pretty obvious.

Step 5


Insert the new diaphragm
Insert the new diaphragm
Place the new diaphragm in the valve just as the old one and make sure it's seated correctly.

Step 6


Reinstall the valve top and solenoid
Reinstall the valve top and solenoid
Put everything back together (including that important spring) and test the system.  You should notice the leak has stopped.  However, you might want to give the new valve a day to make sure.


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