Sleeving for 25mm Water Main

[aaront]

Can this be 1.25" pipe or does it have to be bigger?

 

[masona]

I take it the sleeving you're talking about is thru' the wall ?

If so,it should be okay but I would go slightly bigger for expansion movement.When I did mine I use a 40mm waste pipe which give you approx 7.5mm on each side of a 25mm water main.

 

[aaront]

Its going 750mm underneath my front garden rising under the foundations to 150mm under my porchway and then into the under floor space in my front hallway wia a hole in the brickework.

 

[masona]

The only time to sleeve it, is when going thru' the wall to protect the pipe and there no need to do it anywhere else.When I did mine I put 50mm foam pipe insulation to keep it frost-free,even then the water company said it not really necessary!

 

[COG]

The water regs do say that it has to be sleved as it passes below or through the boundry, I cant find any spec on material or size,so its prob just "good practice"