Residential Septic Drain Field Design

A septic drain field is a vital part of any septic system.

Residential septic drain field design. A conventional septic system is typically installed at a single family home or small business. 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. The size necessary for your drain field will depend on a few. If it takes less than 5 minutes for the water to drop 1 inch in a saturated hole the effluent will move too rapidly to be treated properly such as in sandy.

The gravel stone drainfield is a design that has existed for decades. Field size dimensions depth layout suggestions. The new regulations state that for any house up to and including 3 bedrooms the minimum size sewage system that can be installed is for 5 persons with one extra person added for each extra bedroom. Design guide for septic drainfields.

The length of the soakaway drainage field drains is determined by the number of bedrooms in the house and the porosity of the soil. 1 inch in 3 minutes sandy soil. 1 inch in 48 minutes clay soil. The name refers to the construction of the drainfield.

In its basic form a septic system consists of a septic tank where solids settle and decompose and a drainfield where liquid discharged from the tank is treated by bacteria in the soil. With this design effluent is piped from the septic tank to a shallow underground trench of stone or gravel. Leach field or soakaway field size requirements for these septic system designs. A septic system is the most common method of sewage treatment for homes and businesses that are not connected to an area wide sewage system.

Building a septic drain field is time consuming but pays off in the long run. Septic tanks last from 15 to 30 years. An improperly designed drain field will do nothing but cause huge problems with the entire system. Step 1 determine the size.

If placed in an area with good ground absorption a drain field can last up to 10 years. Like your septic tank the size of the drain field will depend on the square footage of your home the size of your family and how much water you typically use. This leachfield footprint reduction allows people to build homes and create successful alternative septic systems on small lots that cannot support a traditional larger sized septic system. Unfortunately drain fields also known as leach fields do not last that long.

The drain field also called the leach field performs more than half the job in a conventional residential septic system. Trench line specs detailed specifications leach fields gravelless systems deep trench systems shallow trench systems cut and fill systems absorption bed systems. Norweco accommodates ledge considerations for up to 4 bedroom homes.