This is not what I usually work with and am looking to sub out an issue that came up removing old flooring in the basement. I have a residential job where the basement has footers 3' below the poured bsmt floor. Looking to have a new interior drain system installed to replace the failed clay tile system that was installed a few inches below the bsmt floor. Where should the drain be? I was under the impression the drain should be at the footer. A few companies have quoted the job but say that it doesn't need to be that deep to relieve static pressure. This house has had water issues to the point where the bsmt floor has fallen 4 inches in a few corners. I have fixed all the downspouts and grading on the exterior now I want to make sure the sub installs the proper solution on the interior.