Residential Septic Repair. We started trying to find the distribution box, which ended up being under the sidewalk. We removed the disintegrated D-Box, replaced with a brand new one, completed a flow test on the new d-box to ensure field was operating correctly, tied in the septic pipe to the D-box, and placed sidewalk back in same location it was without having to pour a new sidewalk. We completed this entire project in one day!