Drainfield

The septic tank effluent is allowed to flow to the drainfield by gravity or is dosed by pump or siphon. The effluent enters the soil and is treated as it percolates to the groundwater.

The soil acts as biological filter to remove nearly all harmful substances including disease-causing bacteria and viruses, toxic organics and other undesirable wastewater constituents remaining in the septic tank effluent.

The drainfield provides final treatment of the wastewater and releases the treated water into the groundwater recharge. The drainfield is typically built as a series of trenches or as one larger bed, and is usually one to three feet below ground level.

The drainfield must be constructed in permeable soils, have a level bottom, and be two or more feet above the groundwater table. While there are many types of drainfield systems such as aerobic, lagoon, sand filters or gravelless chamber technology, we will describe here a typical gravel and pipe system.

The excavated trench or bed is filled with six to twelve inches of gravel. The gravel exposes a soil infiltrative surface and provides storage for the wastewater.

A perforated pipe is laid over the gravel to distribute the partially treated liquid, called effluent, from the septic tank over the bottom of the drainfield. The gravel and pipe are covered with synthetic fabric to help keep soil particles out of the system and the area is backfilled with soil to cover the system.



Previous Article : Graywater System - - Next Article : Septic System Cost

Featured Articles
Providing Quality Service...Guaranteed In the Greater Austin Area of Travis, Hays, Williamson, Burnet, & Bastrop Counties , The Hills, Jollyville, McNeil, Driftwood, Kyle, Bear Creek, Jollyville, Bartlett, Thrall, Misc Locations, Bell County.
Call (512) 338-1804 for fast, dependable service.
Alternative Septic System Regarding your Home Aerobic Treatment Unit: The components in your home plant should be serviced at least twice per year. The tanks must be...
Why Stay On A Septic System? Top 5 Reasons for Preserving Onsite as a Viable, Even Preferred, Sewage Management Option: Better protection of public health is possible ...
Aerobic Septic System? Why do so many customers end up dissatisfied with their septic systems? We feel it starts with nobody asking or even considering the owner's opinion before...
  • Septic Tank Size Septic Tanks are usually about 4.5 feet wide x 8.0 feet long x 6 feet tall. Tanks are...
  • Failed Septic System A system that is used conservatively and maintained regularly by pumping the septic tank can last a very...
  • Septic System Parts If you are looking for parts and tools to do maintenance on a septic system, then look no...
  • Septic Tank Failure Failing systems that result in water coming to the surface are a public health hazard and can cause...
  • Aerobic System Pumping Aerobic Treatment Units (ATU) generally require more frequent pumping than do septic tanks of comparable size. There...