Laying water pipe

alexlyons

Mods please move if necessary.


I'm burying a water pipe in my split level garden. The patio is ground level for 4 metres and the grass is 1200mm above that for a further 4 metres (where the pipe will surface).

I plan on doing the work myself and my concern is how deep the pipe must go. There is a mains feed to the attic, so thats where I'll be pulling from, decent pressure so no issue. Need mains in the shed.

Therefore the end of the new pipe will be well below (3-4m) where the feed starts.

The pipe will emerge from the house and go under the patio. I can dig the trench under the patio (the narrower the better so re-levelling the slabs is less of an issue) to a depth of 500mm or so. Its a small garden and could get extremely awkward without destroying the whole patio to even get that depth.

However when it gets to the raised grass (retained by a wall), it needs to come back within 300mm of ground level to go under the wall and can then sit 600mm below the grass.

Is this sufficient to prevent freezing? and what sort of insulation is best to use in a very narrow trench to protect even further?

All thoughts welcome

Big Lar

Just stick it into the ground about 9 inches and you'll be grand, be sure to use heavy gauge pipe