Connecting to lead supply pipe

Discussion in 'Plumbing and Central Heating' started by danr86, 29 Mar 2012.

  1. danr86

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    Hi, I've got a leaking / not working internal stop cock which I need to replace. The pipework between the internal stop cock and the street stop cock is lead and I don't fancy digging a trench etc and paying Thames Water to connect new plastic pipework. The pipework from the internal stop cock internally is copper.

    Can I cut the old lead pipe close to the stop cock and connect one of these lead to MDPE couplers? http://www.toolstation.com/shop/p74879 Then connect 25mm pipe through the sub floor void in the hallway and then below the new screed that will be put down in the kitchen and then connect a new internal stop cock in the kitchen?

    Also, does the MDPE in the floor void need to be lagged / insulated / boxed in something?And how should I run the MDPE under the screed - in the insulation or chase out the screed afterwards?

    Thanks in advance.
     
  2. dcawkwell

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    You need a lead loc.
    The plumbers merchant will know what you mean.
    You may also need to file down the lead pipe to get
    it to fit into it as lead varies quite a bit.
    They come in different sizes and will allow you to connect straight
    onto a 15 or 22mm copper pipe. From there you can connect a stop valve.
     
  3. danr86

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    This may be a stupid question but what's the difference between a lead loc and the lead to mdpe coupler in the link?
    Also why would you go for copper rather than MDPE?
    There's quite a long run (around 9m) from where the current stopcock is in the hallway (under the floor) to where I want to put it in the kitchen.
    Should I keep it where it is even though it's not accessible unless I pick up the flooring or move it to the kitchen?

    Thanks
     
  4. dcawkwell

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    You can do that if you wish but I would like a stop cock at the boundary where the water is entering the house so I can cut the house off completely.
     
  5. danr86

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    So are you saying Thames Water stop cock, then internal stop cock under the floor by the door way, then another stop cock in the kitchen or just forget about the kitchen stop cock?
     
  6. dcawkwell

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    Yes I would certainly put a stop cock where it comes into the house.
    I would make it accessible somehow. The you are free to do service valves or stop cocks in the rest of the house.
    I would just feel safer knowing I can stop the water into the house right
    at point of entry.
     
  7. Agile

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    Pipe under floor has to be insulated.

    You cannot bury mains pipe in concrete. It has to be accessible but a flexible pipe can be fitted in a tube duct so it can be pulled out.

    Tony
     
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  8. danr86

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  9. doitall

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    Philmac universal coupler is the best fitting for what you want.
     
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  10. DeltaT2

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    Get a Real Plumber in & he'll wipe a lead ball joint on it in minutes....................... ;)
     
  11. doitall

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    Not allowed to. :mrgreen:
     
  12. Agile

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    I thought you would have known thats no longer allowed!
     
  13. tim00

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    As the answers above indicate, manipulating, or even working with in-situ lead service pipe is nowadays a contentious issue.
    Some Utilities will insist that the lead is replaced if their attention is drawn to it or before they will make any connections at the external stop-tap.

    AAMOI: when i was young, i was taught to use "Bobbins" to bend thin wall 3" and 4" closet bends - a waste of time, i never had occasion to use. Lead wiping is going the same way.
     
  14. Charnwood

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    Lead-Locs are made by Melimatic, a UK company. The one in your link will possibly be made in Eastern Europe or the Far East.

    The word 'leadloc(k)' is now used as a generic term, like ballofix and hoover.
     
  15. DeltaT2

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    Ach, it's plainly daft how you can't connect a lead pipe with a wiped joint & I've not seen any Water Byelaws Polis around for ages!!

    Our Artisans always carry a bar of solder, just incase we have a lead pipe problem. Saves hours running to a Plumbers' Merchants & trying to get the right size of LeadLoc. Also, these days you can be further delayed by Qs at filling stations, caused by the brain dead morons panic buying fuel............. :LOL: :LOL:

    There's never a problem getting the red derv we run our vans on??!!!............. :LOL: :LOL: :evil:
     

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