Shut off valve won't close


Old 09-09-08, 03:49 PM
Thread Starter
Join Date: Sep 2008
Posts: 2
Received 0 Votes on 0 Posts
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
Sponsored Links
Old 09-09-08, 08:44 PM
waterwelldude's Avatar
Join Date: Jun 2008
Location: S.E. Texas
Posts: 1,042
Received 0 Votes on 0 Posts
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.

Old 09-10-08, 08:54 AM
Thread Starter
Join Date: Sep 2008
Posts: 2
Received 0 Votes on 0 Posts
Shut off valve won't close

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
Old 09-10-08, 03:47 PM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,967
Received 5 Votes on 5 Posts
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.
Old 09-10-08, 06:43 PM
plumbingods's Avatar
Join Date: Apr 2008
Location: Manch-vegas, New Hampshire
Posts: 2,182
Received 0 Votes on 0 Posts
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.
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: