Question about Rainbird Rain Bird 1" Automatic Sprinkler Valve Cpf-100
Does the pressure on the 2 sides of the diaphram equalize through the little white plastic peice in the diaphram? If so does it get clogged up?
The valve should have screw around the top of it unscrew them and it will come apart usually there is a small rock or a piece of calcium in the valve that will stop it from closing completely
Posted on Nov 27, 2014
Sounds to me like you may have a bad selonoid if your sprinklers are on timers. If not on timers ,you have a bad valve, and it should be replaced.I hope this helps solve your problem
Posted on Feb 18, 2014
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Posted on Jan 02, 2017
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Inside the valve is a seat and a rubber disc that closes it off. Chances are there's either debris on the rubber or it has rotted, causing a little bit of water to flow past the opening. There's a diaphragm assembly kit for it for less than ten dollars at your local sprinkler or irrigation store. To replace it you have to shut the water pressure off to the valve, unscrew the screws holding the top to the body, then remove the top and diaphragm assy. Be careful to not lose the spring on the top of the diaphragm. Once it's open and parts removed, it may be necessary to flush the valve. To do that turn the main pressure on for a moment and all the water (and possible debris) will shoot out the top. Be careful as this can be quite a gusher. Think "Old Faithful"
Then, making sure the seat (round opening in the bottom of the valve) is clean and free from debris, place the new diaphragm assembly, with the spring on top, into the body making sure it sits square. Then replace the top, or bonnet, and carefully screw the screws back into the holes. I say carefully because the screws are stainless steel and the body is plastic and will strip easily. Only tighten them snug, then about an eighth of a turn, in a star pattern so as not to warp the bonnet. When you turn the pressure back on you'll see if you did it correctly when there are no leaks. If there are little jets of water shooting from the side then you can gently tighten the corresponding screws.
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