Connecting underground water pipe

[bluebaron]

i have a 15mm copper supply to my house.

I need to run it into the house in a different location and cannot run a whole new main for various reasons.

I was going to access the pipe outside and then connect a 15mm full bore coupling to 15mm plastic and run around the house to the new location and then in.

I assume there we be no benifit in connecting to 22 or 32mm pipe as the restriction is already in the 15mm pipe?

Do I require a special underground coupling or will a standard John guest type be sufficient?

I will run the pipe in underground insulation.

Thanks

BB

 

[polesapart]

15mm copper? Really?

OK if so, I'd continue in standard underground blue poly, 20 or preferably 25mm (not much difference in price). Transition couplers are available - Philmac make good ones.

Speedfit is not recommended for underground services.

 

[bluebaron]

Thanks Polesapart,

something like this then?

http://www.plumbingplace.co.uk/Philmac_Transition_Coupling_1033.html

 

[Agile]

I assume there we be no benifit in connecting to 22 or 32mm pipe as the restriction is already in the 15mm pipe?

Thanks

BB

That is a common fallacy!

The flow rate depends on the total resistance.

So use standard 25mm pipe so that the total resistance is kept to a minimum.

Tony

 

[polesapart]

Yes

 

[Nige F]

Probably Table Y soft copper - only good stuff used in Sussex