As a gallon of wastewater flows into the septic tank from the house, a gallon of effluent (liquid waste) flows out of the tank into the drainfield. If wastewater moves in and out of the tank too rapidly due to constant or heavy water flow, solids remaining in the wastewater may move out of the tank into the drainfield, clogging it.
Conserve water and spread out water usage by following these suggestions:
Wash one or two loads of laundry a day, rather than three or more loads in one day.
Install low-flow water fixtures, low volume toilets, and low water-use appliances.
Check for and repair leaky toilets, faucets, and other leaks in the plumbing system.
Take short showers.
Turn off the faucet while brushing teeth or shaving.