Posted: Mon Apr 02, 2012 2:13 am
It seems pretty straight forward for bedding pipework which is running horizontally in the ground, as described in the 'Bedding Types' and 'Pipe Laying Basics' sections but how would you go about bedding pipework running at a gradient?
I am wanting to replace my old cast iron soil pipe with a new plastic one.
The current pipe runs down the rear of the house into salt-glazed pipe sections.
The cast iron pipe enters a short 45 degree clay bend about 2 brick courses below dpc then runs away from the house at approximately 45 degrees (looking at it in plan view) and also at a gradient of approx 45 degrees meeting the main pipe with an oblique junction about 1.2m away from the foundations with 3 socketed clayware pipes preceeding this.
It is a 1930's semi and only the main pipe seems to be bedded anything near correctly. The pieces mentioned above (45 bend,3 socketed pipes and oblique were just on mud.
If I replace the soil pipe, 45 bend, 3 socketed pipes and oblique with their plastic counterparts, obviously using the correct coupling to connect the new oblique to the old main pipe.
How would the back filling be done for the plastic pipework that is running at a gradient from 2 brick courses below dpc down to about 110cm depth of the main pipe?
Would it be stepped down?
As I would imagine that throwing gravel/granular material into a trench that is running at a gradient will just fall to the bottom of the trench!
Hope I have explained this correctly?
Thanks in advance.
I am wanting to replace my old cast iron soil pipe with a new plastic one.
The current pipe runs down the rear of the house into salt-glazed pipe sections.
The cast iron pipe enters a short 45 degree clay bend about 2 brick courses below dpc then runs away from the house at approximately 45 degrees (looking at it in plan view) and also at a gradient of approx 45 degrees meeting the main pipe with an oblique junction about 1.2m away from the foundations with 3 socketed clayware pipes preceeding this.
It is a 1930's semi and only the main pipe seems to be bedded anything near correctly. The pieces mentioned above (45 bend,3 socketed pipes and oblique were just on mud.
If I replace the soil pipe, 45 bend, 3 socketed pipes and oblique with their plastic counterparts, obviously using the correct coupling to connect the new oblique to the old main pipe.
How would the back filling be done for the plastic pipework that is running at a gradient from 2 brick courses below dpc down to about 110cm depth of the main pipe?
Would it be stepped down?
As I would imagine that throwing gravel/granular material into a trench that is running at a gradient will just fall to the bottom of the trench!
Hope I have explained this correctly?
Thanks in advance.
