Shut off valve won't close

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  #1  
Old 09-09-08, 03:49 PM
A
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Shut off valve won't close

Hi All
I need help before I have a flood on my hands.

I am trying to shut a hot water supply valve to a stall shower and the valve handle and stem(first I thought that the handle was loose) turn but the stem doesn't advance.

This is a multifamily home so I can't shut the whole system, and I need to shut this down for a few days

The valve has not been operated for many years.

Is it possible that the stem threads are not engaged and can be reseated (meaning that a little "tap" with a hammer will seat it)

Any suggestions will help

Thanks, Anthony
 
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Old 09-09-08, 08:44 PM
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Hi and welcome to the forums.

It sounds to me like the valve is no good. (You probably knew that) The stem with the handle. is it plastic or cast? If its plastic the threads may be stripped. If it's steel, the threads may have corroded away. Hitting it with a hammer is never a good idea.
Either way, it sounds like you are going need a new valve.


Travis
 
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Old 09-10-08, 08:54 AM
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Shut off valve won't close

Travis
Thanks for the response.

It is a 75 year old cast gate valve (3/4"), ceiling mounted with the stem inverted.

I figured that there was corrosion, but that I could coax the threads into mesh.

Looks like I have to change out the valve before I redo the shower plumbing

Thanks again
 
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Old 09-10-08, 03:47 PM
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I would opt for a brass ball valve as a replacement. Whoever invented pvc and cpvc ball valves should be tarred and feathered. They always fail years into the project and will not shut down properly after time.
 
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Old 09-10-08, 06:43 PM
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Gate valves were supposed to be great and to replace the stop with washers, but alas, they brass inside the valves become brittle ove the years and the threads can and will strip right off rendering the valve useless. I have been on many jobs where we were able to close them and never open them again.

I agree with chandler 100%, Use ball valves.
 
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