Extending water mains pipe

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Hi, hoping someone could give me some advice on what work is likely to be needed in this situation :

I live in a new build and my water main comes in under ground via a blue MDPE pipe from the front of the property, goes under the property, to the back wall of the property (under sink). We are now looking to have a house extension which means this wall will be pushed back around 2.5 metres. This means of course that the water mains pipe will need extending. My question is: what option(s) are there? Could it simply be extended using a compression fitting and if so could this be buried within concrete floor?

Just want an idea of what work is likely so I can budget for it.

Many thanks in advance
 
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You can isolate the incoming supply via external stop tap, this would allow you to remove the existing internal stop tap and extend pipework, a compression joint can be used if the this joint is going to be easily accessible, if not a soldered joint if copper would be more appropriate.
Plastic pipe would be okay buried within concrete, copper pipe would require protection from the corrosive elements of concrete.
 
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The join would have to be under the floor and as we are planning on having it tiled it would not be very accessible. Was unsure if you were allowed to bury joins.
 
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Why can you not just leave it where is it, or are you removing the wall and extending the room rather than adding one?


Daniel
 
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I dont understand how United Utilities(?) have allowed your water service to be piped under a new build concrete floor? From front to back under concrete?

Are you certain of the pipe route?
Where is the external stop-tap located?

What type of house is it - semi, terrace etc.?
 
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I think if the pipe is to laid in concrete, it would be best for a duct to be installed for the pipework and lagged. This would reduce corrosive effects and allow for contraction and expansion of pipe and prevent frost and undue warming.
 
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I dont understand how United Utilities(?) have allowed your water service to be piped under a new build concrete floor? From front to back under concrete?

Are you certain of the pipe route?
Where is the external stop-tap located?

What type of house is it - semi, terrace etc.?

It is how they tend to do them - certainly on the new builds round here. The pipe is run through a duct so if ever needs replacing it can be pulled out and new one pushed through.
 
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I think if the pipe is to laid in concrete, it would be best for a duct to be installed for the pipework and lagged. This would reduce corrosive effects and allow for contraction and expansion of pipe and prevent frost and undue warming.

My main concern was having to have a join in the floor (and if this was allowed) and not having access to it.

Thanks for all your input
 
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It is how they tend to do them - certainly on the new builds round here. The pipe is run through a duct so if ever needs replacing it can be pulled out and new one pushed through.
If you extend the duct you could pull the pipe complete with fitting back out if you ever need to. You can fit a compression fitting on blue plastic pipe
 
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toneb,

If you are still around, i'd like to discuss your water service a little further?
 
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