Septic tank pumps must be used when the wastewater will not flow by gravity. The majority of septic systems are based on gravity to move materials from the tank to the field lines. Septic tank waste material from a home must flow downhill. Where the elevation of the entrance pipe is higher than the homes waste pipe, a a septic tank pump system must be employed. Typically, the waste material flows to a central location, such a septic tank or collection basin. In a common home waste septic system, a drain field is built and the waste water is evenly flowed into the "leech" field. This allows the water to be treated by slowly