Any problem with your sewer system is certainly unpleasant. Wastewater backing up into the drains of your house is also unsanitary. During this time, many people wonder when they last had septic pumping done and whether it would help. When the tank has not cleaned, the bottom layer rises. This obstructs the pipes that distribute the water and let it out of the tank. The material flows back into the building and through the drains. Septic pumping will solve the problem, but you may still need additional tank cleaning and repair to restore the system's functionality.