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Black mains water pipe

  • 10-05-2019 6:52am
    #1
    lomb
    Registered Users, Registered Users 2 Posts: 6,017 ✭✭✭


    My apartment has a black supply pipe with a leaky stopcock from the packing of the handle, while it still sort of seals I would like to fit a lever valve after it. Im familiar with plumbing having plumbed a new hot water cylinder, soldered fittings, tectite etc but have never worked on mains pipe. The outer diameter is the same as 3/4 qualpex pipe but what inserts work here? Persumably I can use standard 3/4 compression lever valve but should I use brass or copper olives. Cheers


Comments

  • #2
    Cerco
    Registered Users, Registered Users 2 Posts: 2,063 ✭✭✭Cerco


    Are you sure it is leaking and not condensation on the body.

    What would a lever valve achieve after the stopcock?

    If the stopcock is leaking it may simply need tightening , new washer or replacement.


  • #3
    lomb
    Registered Users, Registered Users 2 Posts: 6,017 ✭✭✭lomb


    Def leaking out of tap not condensation. Lever valve means can be easily turned off when leaving apartment and more reliable. Also no way to shut the apartment off without turning off the building. Its 25 years old also

    Is the inner diameter of 3/4 mains pipe the same as 3/4 push fit pipe for insert/ compression fitting?


  • #4
    listermint
    Registered Users, Registered Users 2 Posts: 34,216 ✭✭✭✭listermint


    First question.


    How is you are going to stop the flow before replacing ?


  • #5
    lomb
    Registered Users, Registered Users 2 Posts: 6,017 ✭✭✭lomb


    The stopcock still works, its leaking out of the hub around the tap section. I know I can tighten the hub nut around its packing to stop this leak but the main rubber bung under the tap section is still sealing.


  • #6
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,378 Mod ✭✭✭✭Wearb


    lomb wrote: »
    The stopcock still works, its leaking out of the hub around the tap section. I know I can tighten the hub nut around its packing to stop this leak but the main rubber bung under the tap section is still sealing.
    Undo the nut holding the gland packing. Get about 150/200mm of ptfe tape and roll it into a type of thread using your thumb and fingers. Wrap this around the spindle on top of the existing packing and re-tighten the nut.

    Often worked for me on radiator valves.

    Please follow site and charter rules. "Resistance is futile"



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  • #7
    K.Flyer
    Registered Users, Registered Users 2 Posts: 8,565 ✭✭✭K.Flyer


    ^^^^^

    Yep, I've done the same a few times, including a mains stopcock, it can save a lot of time and trouble.


  • #8
    antiskeptic
    Registered Users, Registered Users 2 Posts: 9,555 ✭✭✭antiskeptic


    Make sure your lever valve has a gland and nut to tighten down onto it. Often they don't and they are dead unreliable. Operate it after a fee years and ot will leak.

    I don't understand how your going to use the stopcock you're replacing to stop the flow of water whilst you replace it??

    Is the pipe downstream of the stopcock the same stuff? If so you can see whats been used / take a photo and head to heat merchants. Danger is its thick walled and standard inserts won't work.


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