Residential Septic Tank Drain Field Layout

Field size dimensions depth layout suggestions.

Residential septic tank drain field layout.

With this design effluent is piped from the septic tank to a shallow underground trench of stone or gravel. Trench line specs detailed specifications leach fields gravelless systems deep trench systems shallow trench systems cut and fill systems absorption bed systems. A septic drain field a septic tank and associated piping compose a septic system. A typical septic system consists of a septic tank and a drainfield or soil absorption field.

A septic drain field is a vital part of any septic system. Because cleaner effluent will require less treatment in the drain field a drain field for a type 2 system can be smaller than that processing effluent from a type 1 system and a. Code approved conventional septic drainfields or leach fields are described here design criteria for septic drainfields and septic absorption bed systems soakaway fields table of septic drainfield trench lengths determined by soil percolation rate and daily wastewater input flow materials to be used for drainfields gravel guidelines for use of seepage pits in septic systems. Septic tanks last from 15 to 30 years.

The gravel stone drainfield is a design that has existed for decades. Step 1 determine the size. Septic drain fields also called leach fields or leach drains are subsurface wastewater disposal facilities used to remove contaminants and impurities from the liquid that emerges after anaerobic digestion in a septic tank organic materials in the liquid are catabolized by a microbial ecosystem. When you design your drain field there are a few things to keep in mind.

The soil should. If placed in an area with good ground absorption a drain field can last up to 10 years. The construction details including the layout of all sewers outside of the home the location and depth of all tanks the routing and depth of pressurized effluent lines and other system parts such as the drain field and any additional atus must match the septic system plans as approved by the local county health department. Unfortunately drain fields also known as leach fields do not last that long.

The septic tank digests organic matter and separates floatable matter e g oils and grease and solids from the wastewater. Building a septic drain field is time consuming but pays off in the long run. Design guide for septic drainfields. Soil based systems discharge the liquid known as effluent from the septic tank into a series of perforated pipes buried in a.

An improperly designed drain field will do nothing but cause huge problems with the entire system. The type of septic system whether it is a type 1 type 2 or type 3 system will affect the quality of the effluent flowing into the drain field from the septic tank. The size necessary for your drain field will depend on a few factors. Leach field or soakaway field size requirements for these septic system designs.

The name refers to the construction of the drainfield.