Everything in the toilet tank has been replaced. What are my options? If I install a new toilet is that likely to solve the problem? Can a plumber tell if the drain leading from the toilet to the septic tank is causing the problem?: More likely something in the toilet itself.: : Toilet almost overflows, sometimes overflows. Water level in bowl sometimes lower than others. Septic tank has been pumped. Drain field has been cleaned. All other drains working fine. Other toilet works fine. Could there be a blockage between toilet and septic tank?
