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stopcock

A stopcock is a form of valve used to control the flow of a liquid or gas. The term is not precise and is applied to many different types of valve. The only consistent attribute is that the valve is designed to completely stop the flow when closed fully.

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  1. M

    Imperial stopcock issues!

    Hello, I am a homeowner looking for advice. The mains water comes into our property via the downstairs cloakroom. House was built late 1970s. We've had three plumbers (local) that have been stumped/unable to remedy the situation. We're having the downstairs cloakroom refitted, and the...
    • montanajr72
    • Thread
    • america imperial issues stopcock usa
    • Replies: 6
    • Forum: USA
  2. K

    Leaking mains stopcock

    The internal stopcock was closed for the first time in about a year as part of a bathroom installation. Now that it's open (I leave it a quarter turn from fully open) it has a slight leak, approx half an egg cup full in 24 hours. Should I get it replaced? Thanks in advance.
    • keith2511
    • Thread
    • america leaking mains stop cock stopcock usa
    • Replies: 2
    • Forum: USA
  3. N

    Old stopcock gland nut – unusual & stuck

    Hi – can’t turn this nut with serrated edges. Tried big pliers & gave stilsons a gentle go – but to no avail. Since brushed it clean & found it’s chewed up a bit. What’s the best tool & process before I damage it further? It’s dripping from spindle when shut off tight but trickling when open...
    • ncdesign
    • Thread
    • gland gland nut nut old stop cock stopcock stuck unusual
    • Replies: 15
    • Forum: Ireland
  4. G

    Stopcock advice please!

    Hi all. We had some plumbing work done this week and now our stopcock is weeping from the gland nut. Three times in 2 years this nut has been tightened and has no more to give. 2 years is time lived here not age of stopcock. Unsure on that. Now if I pay someone to repack the gland am I just...
    • Gem1983
    • Thread
    • advice america please stopcock usa
    • Replies: 8
    • Forum: USA
  5. A

    Stopcock not turning off all water to house - pipe leaking underfloor

    I’m looking for a bit of advice as I’ve just had a plumber around so wanted to see if his theory matches others. I’ve just inherited a house so wanted to start renovations, when I went to pull up utility tiles noticed they had started coming up..remove them and there is a stretch of cement that...
    • Anp
    • Thread
    • america house leaking pipe stopcock turning underfloor usa water
    • Replies: 7
    • Forum: USA
  6. S

    Help with identifying stopcock under sink

    Hi everyone I’m trying to locate my stopcock. I’ve searched the house inside and outside and I think it must be one of these two brass taps under the sink. Photo Attached ( the bottom one is almost hidden by a pipe). The bottom one does not budge at all (although I haven’t tried some WD40 on it...
    • Sonicboom
    • Thread
    • america help identifying sink stopcock under usa
    • Replies: 13
    • Forum: USA
  7. M

    Fitted new stopcock valve but it's leaking

    Evening all, I've just fitted a genuine stopcock valve but as you can see in the picture water is beading around where the unit is pressed/sealed together? Not sure if I'm able to fix this or do I need another new valve? Many thanks
  8. B

    What is the stopcock for

    Hi everyone, I have two stopcocks in my kitchen, one under the sink and one close to the wall near the combi boiler. The one under the sink turns off the cold water but the other one doesn't turn off anything is it worth my while to turn it off or just leave it as it is. I believe many years...
    • BobbyJoe
    • Thread
    • america stopcock usa
    • Replies: 5
    • Forum: USA
  9. J

    How do I stop water supply to feeder tank

    I have had an intermittent overflow from my feeder tank in my flat for some time. One plumber changed the ball valve and another changed the setting on the central heating pump. I have been staying with a friend during the lock-down. Before I left I turned off the boiler and closed the stopcock...
    • John P
    • Thread
    • america overflow stopcock supply tank usa water
    • Replies: 4
    • Forum: USA
  10. Stanios

    Old Stopcock on Lead 1/2" ~ 3/4"

    Encountered this old stopcock, male threads both ends attached to female fittings that are welded onto lead pipe both ends. Looked like 1/2", took it off, closer to 3/4" but quite a bit smaller than 3/4" still.. Photo is not of that stopcock but looks exactly the same (forgot to take a snap)...
    • Stanios
    • Thread
    • america lead old stopcock usa
    • Replies: 6
    • Forum: USA
  11. J

    Outdoor stopcock leaking

    Hi all, I have noticed there is a leak on my outdoor stopcock. This morning it was full to the lid so I syphoned the water out assuming it was due to the heavy rain the before but then 6 hours later noticed its full again. Is this a problem Thames Water has responsibility to fix or is it up to me?
    • Juman islam
    • Thread
    • america leaking outdoor stopcock usa
    • Replies: 23
    • Forum: USA
  12. D

    Old Welded Mains stopcock leaking

    Looking at the picture attached would you say that this old stop tap can be taken apart and the washer replaced rather than making the job more complicated than it need be. It looks like a really old type of stop tap situated under the kitchen sink flat to the wall with no space around it to...
    • Diezeltruck
    • Thread
    • america leaking mains old stop cock stopcock usa
    • Replies: 7
    • Forum: USA
  13. H

    stopcock being noisy

    My stopcock is located in upstairs airing cupboard. Is it normal to hear water rushing through the pipes. Tried turning it down to no avail
    • Highlandlass
    • Thread
    • america being noisy stop cock stopcock usa
    • Replies: 2
    • Forum: USA
  14. Andrew Stride

    An old mains stopcock on an 30mm pipe needs replacing, please help.

    I need to replace the stopcock on an old mains water pipe. The house is about 60 years old, the pipes OD is 30mm, my local plum centre said they had no parts available to do this. The old stopcock is leaking and seized solid. Any advice about where I can get the parts to fix the problem would...
    • Andrew Stride
    • Thread
    • america correct help mains needs old pipe please replacing size still stopcock urgent usa water
    • Replies: 4
    • Forum: USA
  15. P

    Searching for stopcock, what’s this please?

    Hi all, just moved in to a new house and currently searching for the stopcock, this is under the kitchen sink, I’ve turned it on and off but doesn’t seem to do anything. Any ideas what it is for please? Also, any ideas where else the stopcock might be?! Many Thanks
    • Plumbnoob
    • Thread
    • america please stopcock usa
    • Replies: 5
    • Forum: USA
  16. D

    Leaving old stopcock in place

    My main stopcock is passing slightly when closed and difficult to operate so I intend to replace it. It is very close to the concrete floor making it very difficult to make a good joint if I cut it off. I was thinking of putting a new valve above the existing one and just leaving the original...
    • David Rigg
    • Thread
    • america old place stopcock usa
    • Replies: 4
    • Forum: USA
  17. T

    Leaking stopcock on old Alkathene pipe. Yikes!

    I have a problem with an old stopcock (40 years?) fitted on the old alkathene supply pipe. This is in a property owned by an elderly friend and the stopcock has been leaking from the spindle for many months. Despite several attempts to pack out the gland with PTFE the valve continues to leak. My...
    • The Bedwetter
    • Thread
    • alkathene america leaking old pipe stopcock usa
    • Replies: 6
    • Forum: USA
  18. P

    What "key" for this main stopcock?

    After fixing a mixer tap in the kitchen and struggling with stockcock under the sink, it occured to me that I did not know where the main external stop valve for my property was. After having a look around today, I have found it just over the boundary in next doors garden and when I lifted the...
    • Pete E
    • Thread
    • america main stopcock usa
    • Replies: 7
    • Forum: USA
  19. B

    Stopcock and Gate Valve position Query

    Good morning, I would appreciate any advice on the following: I live on the 2nd floor (top floor of building) and have a stopcock under my kitchen sink, one stopcock for water near the boiler in the kitchen and in the hallway in a high cupboard a cold water feed red gate valve. I want to know...
  20. tomtom1

    Stopcock in dining room wall or under boiler.

    We have just moved into our house and are having trouble finding the water shut off valve. There is a sticker on the boiler which says '' Water shut off in dining room wall also below boiler '' I have checked all the obvious places (under kitchen sink, kitchen cupboards, floor board near boiler...
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