A lightweight aluminum container body is provided which is typically of much greater length than the prior art. The container body which has a series of removable filter sections is provided. The container body which includes a top pivoting rear gate sealed by dual hydraulic piston arrangement and manual vice locks is provided. The container body having a central wall supporting a novel manifold and inlet drain offset system which automatically controls the sludge inlet drain flow in a way that positionally balances sediment deposit.