Connecting to lead supply pipe

Joined
28 Mar 2011
Messages
107
Reaction score
1
Location
London
Country
United Kingdom
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.
 
Sponsored Links
Joined
2 Nov 2010
Messages
3,424
Reaction score
516
Location
Humberside
Country
United Kingdom
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.
 
Joined
28 Mar 2011
Messages
107
Reaction score
1
Location
London
Country
United Kingdom
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
 
Joined
2 Nov 2010
Messages
3,424
Reaction score
516
Location
Humberside
Country
United Kingdom
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

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.
 
Sponsored Links
Joined
28 Mar 2011
Messages
107
Reaction score
1
Location
London
Country
United Kingdom
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.

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?
 
Joined
2 Nov 2010
Messages
3,424
Reaction score
516
Location
Humberside
Country
United Kingdom
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.

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?

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.
 
Joined
26 Jun 2004
Messages
64,319
Reaction score
4,690
Location
London
Country
United Kingdom
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
 
D

DeltaT2

Get a Real Plumber in & he'll wipe a lead ball joint on it in minutes....................... ;)
 
Joined
30 Jun 2004
Messages
661
Reaction score
57
Country
United Kingdom
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.
 
Joined
29 Apr 2011
Messages
3,579
Reaction score
551
Country
United Kingdom
This may be a stupid question but what's the difference between a lead loc and the lead to mdpe coupler in the link?
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.
 
D

DeltaT2

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

I thought you would have known thats no longer allowed!

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:
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Sponsored Links
Top