Yet another water supply pipe query...

[!lsx!]

Hi

The very old 2" cast iron water pipe into my cellar has finally let go - spraying in the wall. So I'm in the middle of replacing it with 25mm MDPE.

Check out the tasty iron pipe...

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Where the water pipe used to come through the wall is at about the same depth as 80cm under the garden. The second pic below shows the old supply pipe stub covered in a red rag just before it goes under my garden wall / boundary.

Before I changed anything...
View media item 100691
Now.....
View media item 100692

I'm a bit unsure of the best way to change the MDPE pipe to running vertically once it comes through the wall.

Is it better to 1) run the MDPE through a 110mm bend so a 25-22mm stopcock is the first fitting
2) use a 25mm MDPE bend to change from horizontal to running up the wall, but that would mean a leak from the bend would come before the stopcock

or is there any other way I could do it... like connecting the MDPE pipe to a flange just after the pipe comes through the wall and then fastening a bend to the flange (like the cast iron pipe used to be)

sorry for so many words
​

 

[dilalio]

It’s obviously better to have no fittings between the supplier stopcock and your internal stopcock, but not always possible!
If you can do this, by sleeving it through a conduit and forming a radius in the mdpe that does not crease it, then all’s good.
But if you do need an elbow... not a biggie as long as it’s leak-free when you test it.