so working on septic tank today- dug up the tank for access to the cleanouts and dug to locate the distribution box- found the cast iron pipe connecting them was rusted and split in 2- made for some damp nasty soil underneath the pipe...... so anyway the distribution box end towards the tank has been sitting in wet soil for awhile i guess.... well the concrete has deteriated to the point that the whole corner has disintergrated and is missing or laying in the box...... so my real questin is can i form a new end then pour new concrete in to beef this up or will this not be sealed well enough? i really dont want to replace the box but if i have to then ok because i havent come this far to have more trouble later........