How important are the air and water pumps on an aerobic system?
Both pumps are essential to proper operation of a system. The air pump is used to aerate the wastewater and speed the processes of decomposition. The water pump is used to force the discharge water through the spray lines and onto to the land surface. If either fails to operate properly the wastewater will turn septic. This may be observed as black, smelly water being discharged by the system.