Pipe size for 50m run

[bolst3r]

I want to run water to the end of my garden and the run is around 50 meters. I have a spare feed 15mm copper feed capped off on the back of my house waiting for this connection. I am obviously going to buy MDPE water pipe but am not sure a) what diameter pipe I should go for and b) how to connect the MDPE pipe to the 15mm copper outlet. Down the end of the garden I can add a wall plate elbow and attach a tap to it but not sure what's best from the house.

Thanks for any help

 

[Agile]

Before we can give you a good answer we know what flow rate you have at the supply end and what you expect at the remote end.

Mains water pipes need to be burried a minimum of 750mm down and insulated where they come up!

20 mm will probably be a reasonable size but possibly a smaller one would do.

Tony

 

[bolst3r]

Hi Tony, trench is dug at 750mm will well insulate where it comes above this height out the ground and will put insulated boxing round the outlets to make sure nothing freezes. Think i'm going to go for 20mm mdpe even though it's only needed for a hose but best to be safe

 

[Charnwood]

b) Philmac 1321; 20mm by 15mm connector:

 

[bolst3r]

Hi Charnwood.

thanks for the image, as i'm after a right angle will this one work, can't see how it links to the copper?

http://www.cityirrigation.co.uk/acatalog/Fi_Elbow.html#aPOEFI020B

Cheers.

EDIT: After more research I can see it's a compression fitting – thanks for the help guys.