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Author:
gmum (IL)
Paranoid newbie here....
Backfilled a 7' trench containing new 4" pvc. The repair was made prior to adding pea gravel to the bottom of the trench. After the repair there was about 6" of void space to the bottom and side of the pipe. 2 pieces of the old pipe were wedged under the new pipe as support.
I dumped bags of pea gravel into and around the pipe until it filled those spaces on the bottom and sides and put a small layer on top. I did not use a tamping tool on the gravel though but used my feet to spread the gravel along the bottom as I pouring in the bags. Once I was done with the gravel I added back the sandy soil in about 8" sections which I tamped with my shovel.
Does my technique sound OK?
Was I supposed to wedge the gravel into the bottom void in a different manner?
I am second guessing my method since I did not use a compacting tool on the gravel. I thought about digging it up and trying again but I am not sure if that is a good idea unless I am presented with a problem.
Would you go to the trouble of re-doing this?
Edited 1 times.
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Author:
packy (MA)
my plumbing code extends to a point 10 feet outside the foundation wall. at that point the sewer contractor takes over. my plumbing code says buried PVC pipe must have fine sand 6 inches in all directions of the pipe. the concern is sharp rocks cutting into the soft PCV.
it does sound like you did a very good job. let it settle for a few weeks before topping off with a finish product.
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Author:
gmum (IL)
My concern lays in how much compaction I needed to do with the pea gravel under the pipe.
I just poured the bag into the trench, pushed it under the pipe into that 6" void with my foot and continued pouring the bag on the sides of the pipe until it lightly covered the top.
I didn't do anything for additional support around the couplings.
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Author:
packy (MA)
when cast iron no hub pipe is hung overhead my code says it must have hangers within 18 inches of the clamp. so they must figure that is there is support 18 away you are good to go.
the way you describe you set-up sounds fine to me.
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