Low Pressure Systems . This system involves a pump tank and can allow a lateral field to be put uphill if necessary to get the system into moderate soils. Mound System . This is a very complicated system where sand is mounded in the yard for drainage and covered with sod. It involves a pump tank and specialized design.
Repairs are expensive.
Probably the most common reason for failure on a newer system is homeowner misuse of water. These systems are designed for certain amounts of water usage spread throughout the day and often they are flooded. Please see the section on septic care to help prevent the misuse of your system.