Why put shingle around an underground pipe?
- Thread starter ey143
- Start date
Sponsored Links
Pretty sure it's to allow for movement of the ground, so the pipe doesn't break.
Its to enhance the external load capabilities of the pipe. A bed of shingle enhances it by something like 1.5, bed and surround by 2.2, concrete surround by even more . The figures might not be correct but you get the gist.
Sponsored Links
I thought the bedding material was shingle (or pea gravel by another name)
Yeah, wasn't that the OPs question?
Pea shingle is also much easier to work with as the bed. Easy to level, and when the pipes are in easy to make adjustments to them. Having flexible joints allows for ground movement. With the old salt glazed and sand/cement joints they needed a concrete surround.
It most certainly was, but your answer was talking about jagged stones that might be in the bedding material that was suppose to protect the pipe from jagged stones
Why did they need the concrete surround?
Because the joints were formed in sand/cement mortar, and any movement would damage the joints. The theory was that being completely surrounded by concrete would stop this happening to the pipe run even if the ground moved. You had to test the drains first and then again when creted. And then again when backfilled.
Plastic drains are a big improvement.
Me and my spaniel both agree that it says
used around the pipe to protect it from jagged stones that might be in the backfill or bedding material.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
Sponsored Links
