I'm in the process of replacing the plumbing in my house from the 40s and now have some thoughts.

I've chipped out channels and reached below the concrete and stone setting to the clay bottom. In the deepest areas, there's now some water, and I've noticed that there is a blockage in part of the drainage, so some water is coming in, but this will be fixed. The other drainage on the outside is dry and fine. It's the wettest around the old concrete pipes, which were also damaged in places, so they've probably leaked for many years.

Is this a problem since we didn't previously have issues with moisture in the basement, and under the concrete, it was dry and nice. Is it just a matter of filling with coarse material and casting again???

The first picture shows how dry it was under the concrete, and the second picture shows how there's now water at the bottom, about 40cm below the slab. (One reason for the water is also that I rinsed the drainage, which is blocked...)

Hoping for some quick answers since the work needs to continue...
Thanks in advance!
 
  • Cracked concrete floor with visible soil underneath, indicating a dug trench during a plumbing renovation, showcasing dry conditions beneath the slab.
  • Water pooling in a trench under old house foundation, revealing exposed soil and concrete during a plumbing renovation.
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TyWebb
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can't you dig a small pit and pump scoop out of the pit and see if you can run out of water, if it's because of your flushing
 
Have found where the water seeped in and it turned out that the drainage is bad on one short side of the house. I can say it resulted in a lot more work, but now we're back on track and tomorrow we hope the drainage will be finished and I can return to replacing the threshold.
 
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