basic_hydronium

basic_hydronium OP t1_jdrzkal wrote

Reply to comment by allangee in Looking for advice - can I fix a partial belly by strapping the sewer line to my slab and poly jacking the slab? by basic_hydronium

These are good questions, thanks.

  1. There’s never been water in my sump pump and no drainage issues around the house. No evidence on the sewer cam of a crack line and no evidence of a leak on my water supply. I’m on flat ground with substrate of primarily coarse river gravel. In short no clear cause. Two hypothesis are poor installation under the slab and there was a flood a few years back (prior to possession) that did not leak water into house but would have been close, could have washed away a little. Sewer inspection team with the city says they see this relatively commonly in my area, it usually doesn’t progress, usually installation related. So you’re right, could happen again but there’s nothing obvious to fix. I suppose it could be a crack in the sewer line we can’t see on camera, but would become obvious once poly fill.

  2. Tricky for sure. Plan was to drill 1.5 or 2 inch holes so there’s a little space. Pull out and loosen what you could immediately below the holes. The curvature of the hose clamp will want to hug the outside of the pipe and either hook it or powerful magnet on the other side to pull it back to surface. The pipe should be very close to the slab, it’s relatively close to the stack with relatively long way to go to the tie in and not a huge drop. In short the installation guys would need every inch they could get.

  3. plastic. Ran cameras through it, pipes looks fine as best you can tell from a sewer line. 4” ABS

  4. basement is finished, would prefer not to rip it up. I haven’t checked location of the line with a line finder, just best guess based on camera and tie in points. While the main part of the belly is down a hallway, the lateral from the second stack to the main is also slightly dipping and under my hot water tank and furnace. Would prefer not to be ripping everything out if I can solve more creatively. Breaking out and replacing a couple tiles is a lot less work than redoing a big chunk of the basement.

Thanks for your response. I’m seeing it a bit as a ‘no lose’. If it works I’m golden. If it doesn’t I have to cut into the slab anyway which is where I was at before

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