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  #1  
Old 07-04-2011, 08:03 AM
MEXANDME MEXANDME is offline
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Weathermatic Valve Stuck Open

If the homeowner closes the valve using the flow-control; the water turns off.

Could this simply be one of those old bad square WM solenoids? I know a bad solenoid can cause a valve to not open. Can it also cause a valve to not close?

(I have not been to the site yet.)

Thanks,

Mex
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  #2  
Old 07-04-2011, 08:31 AM
bcg bcg is offline
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Probably a diaphragm. Stuck open is usually diaphragm.
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Old 07-04-2011, 09:15 AM
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FIMCO-MEISTER FIMCO-MEISTER is offline
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My experience with WM valves sticking on is the holes in the diaphragm swell shut or something of that nature. Not sure what WM valve you have though.
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Old 07-04-2011, 09:54 AM
MEXANDME MEXANDME is offline
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Fimco...


....it is the N100SF 1"

Thanks,

Mex
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  #5  
Old 07-04-2011, 10:02 AM
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FIMCO-MEISTER FIMCO-MEISTER is offline
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Quote:
Originally Posted by MEXANDME View Post
Fimco...


....it is the N100SF 1"

Thanks,

Mex
I'm embarrassed or maybe should be proud to tell you I'm clueless as to which WM valve that is. Too lazy to look up either.
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  #6  
Old 07-04-2011, 10:04 AM
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DanaMac DanaMac is online now
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Agreed. Most likely the diaphragm.
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  #7  
Old 07-04-2011, 10:58 AM
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Sprinkus Sprinkus is offline
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That's the Nitro valve.
I'd take an extra one with you.
Could be diaphragm, solenoid sticking/debris in solenoid chamber or port, rock/debris in valve, valve bonnet might be loose, controller may be outputting a constant 24v to valve, etc.
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  #8  
Old 07-04-2011, 11:33 AM
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Wet_Boots Wet_Boots is offline
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I've seen stuck solenoid plungers in the old W*M square solenoids - no debris seen, just stuck. Easily freed, but do you really want to put it back in service?
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  #9  
Old 07-04-2011, 12:41 PM
MEXANDME MEXANDME is offline
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At a minimum, I will replace the solenoid. Probably everything but the body.

I was just curious if a bad solenoid alone could cause the valve to stick open.

Thank again,

Mex
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  #10  
Old 07-04-2011, 02:25 PM
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mitchgo mitchgo is online now
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in my experience .. It's best to not gut swap from those old wm valves .

The brass threads that are placed inside the body just spin around because of the plastic and you can't fully tighten the top down to the body
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