How to Design a Septic System?

Residential Septic System Design is basically an underground structure made up of concrete, fiberglass, or plastic where domestic sewage water is stored for primary treatment. A proper design is required for the proper working of the underground system. We all know that a septic tank is also known as a sewage collection system, also treats sewage on a small scale which is usual in areas with no connection to main sewerage pipes. 

Gets the perfect Septic Tank design drawing from an expert company

Residential Septic System Design is one of the sewage collection systems. Approximately 25% of the population depends on septic tank systems. Many property owners are installing septic systems because they see them as the best option to the public sewer option. If you are planning to install a septic tank for your property, you need to start with the planning and design. 

Necessary steps to know before designing a septic system 

  1. Local laws and regulation – A major project such as Residential Septic System Design installation means you need to make sure that your project is within the laws and regulations of your town. 
  1. Soil test – To work well, the septic system depends upon the quality of the soil. The type of soil, right down to the type of soil grain can dictate how good your septic tank will work. Therefore, consult a professional for your Residential Septic System Design

The perfect residential septic system designs your home and need 

The best suited Residential Septic System Design will benefit your residential property, safeguard the environment and protect the health of you and your family members for the upcoming years. The proper capacity of the septic tank is very important otherwise waste water backflows in your home. The septic tank design thinking of the future increase in the wastewater generation design proper capacity of the septic tank which can last for many years. The residential septic system design has two main chambers each of which is equipped with a manhole cover top. These chambers are parted by means of the dividing wall which has openings located in the midway between the floor and the roof of the tank. A septic tank is installed where there is a lack of proper drainage system. Waste water from the residential property is allowed to enter the tank through an inlet pipe allowing solid particles to settle at the bottom of the tank and scum to float at the top layer. 

What Do You Know About Septic Assistant & Types Of Septic System Design?

Designs of septic systems differ according to their shapes and sizes. Septic system design drawings and size can vary generally, from your town requirements to the all over the nation, because of a mix of elements. These elements incorporate family size, soil type, siteslope, and part size, nearness to delicate water bodies, climate conditions, or even neighborhood guidelines. The following are ten of the most widely recognized sorts of septic system design utilized. The rundown isn’t comprehensive; there are numerous different sorts of septic system design. There are many other types of septic system used and they are the following –

Gravel less Fabric based systems

  1. Stone & Pipe systems
  2. Fabric Based Gravel Less systems.
  3. Chamber systems.
  4. Drip Dispersal systems.
  5. Shaped Stone & Pipe systems.
  6. Recirculating sand filter systems.
  7. Various Trench systems.
  8. Evapo-transpiration systems
  9. Constructed wetland system.
  10. Pre-Treatment Systems.

Conventional System

A decentralized waste water treatment framework comprising of a septic tank and a trench or bed subsurface wastewater dispersal framework (drain field). An ordinary septic system design field is ordinarily introduced at a solitary family home or private company.

The stone drain field is the system type that has existed since the individual on-site treatment systems where conceived. The name alludes to the development of the drain field. With this plan, effluent is piped from the septic tank to a shallow underground trench or bed of stone. A Geo fabric or comparable material is then positioned on top of the field so sand, soil, and different foreign substances don’t enter the treatment stone.

Stone beds are somewhat large in area and may not be reasonable for all private locations or conditions.

Chamber System (Concrete or Plastic)

Gravelless have been utilized for a long time in various states and has turned into a regular innovation eliminating stone beds. Septic system design dispersal area incorporates numerous other sorts of structures like – open base chambers, fabric wrapped tubes. Manufactured material like extended polystyrene media. You can make chamber components with reusable items and can offer you a big savings in carbon impression.

Shaped Stone Trenches GST™ Leaching System

The latest technology to be used for treatment and dispersal of wastewater, is the use of shaped stone trenches.  These trenches differ from conventional trenches as the side walls are not straight, but are shaped, significantly increasing the treatment surface area enabling a much smaller overall footprint area.  These systems require purpose built, reusable forms to construct, but utilize the same aggregate materials as used in conventional systems.  For comparison a 1000sqft conventional bed (1’x25’x40′) utilizing 37cuyds of stone and 250LF of piping could be reduced to a 330sqft footprint (1’x11’x30′) utilizing 16.5cuyds of stone and 66LF of piping.  Resulting in a system 1/3rd the size using 1/2 the stone and nearly 1/4 the piping requirements. As shown in the picture above.

A Comprehensive Guide to Design a Septic Tank

A septic tank is a design used for an underground compartment that is made of concrete, fibre, and plastic by which household sewage flows for simple treatment of the wastes. The main purpose of installing a septic tank is to hold the sewage long adequate to let solid wastes resolve down to the lowest creating slush, while the liquid parts such as oil float to the upper layer. If the property is not linked with the main sewer structure or is situated in an area with an inadequate drainage scheme then there is must need for a well-structured septic tank. They are mainly found in rural areas where they are typically connected underground in the courtyard. From there they usually collect the sewages and treat the sewages to safeguard safe dumping of the wastes. However, the most important question is the proper design for a septic tank. In view of this, here is a certain guide for a septic design that will help to acquire a new idea.


How Does the Sewage Treatment Procedure Work According to Septic System Designs?

The procedure of sewage treatment according to septic system designs mainly starts when underwater goes from the bathroom and kitchen of the house into the main compartment of the septic tank, over an installed drainage pipe. Inside the compartment, the sewage remains there till the time oils appear on the upper layer whereas the solid wastes settle down at the lower layer of the compartment.


Who Play a Crucial Role in Passing the Wastewater According to Septic System Design Drawings?

In the whole process, bacteria play a very crucial part in passing the wastewater and disposing of the solid wastes down. Bacteria mostly work at the upper layer of the compartment which is known as scum. It helps to break down the solid wastes that will transform into the layer of slush down. Once the waste will settle down there will be only water waste left in the compartment which will flow to the second compartment. At last, the residual water that is known as the seepage will be passed out into the earth through the pipeline saturated into the ground for additional treatment of the sewages. This is the complete process of the functioning of the septic tank. However, the proper functioning of the septic tank depends on certain factors such as the number of compartments present in the septic tank, and the kind of bacteria present in the tank.


Types of Bacteria to Have According to the Best Residential Septic System Design

In the process of sewage disposal, there are mainly two types of bacteria are found which include anaerobic bacteria and aerobic bacteria. For the purpose of proper disposal of sewage in the septic tanks, both the bacteria are required.


Anaerobic bacteria:

This kind of bacteria do not require oxygen to live or function. Septic tanks mostly function with the lack of oxygen. Most of the uses prefer to use this system as it is very cheap as well as requires a low price for repairing. However, this system produces a very bad smell and is required to make empty after a certain time. In order to reduce the smell and clear the tank, the sewage from septic tanks must be freed to a drainage system.


Aerobic systems:

This kind of bacteria does require oxygen to live or function. This system needs electricity to function as well as require frequent services. However, this system is quite expensive than the anaerobic system. This system doesn’t need to be emptied more often and also doesn’t produce any foul smell. This is mostly used as it is eco-friendly and also passes the wastewater into the main drainage system.


Quick Wrap Up

Follow this comprehensive guide to design the best septic site plan. And, if you find any difficulties, get in touch with Septic Assistant.


Still, have questions? We Can Help You. Just fill the form & we will be in touch with you soon!


    Test-Pit Logging application

    • A Test-Pit Logging application is now available to try out on the DOWNLOADS page. This can be run directly from this site, or on your Mobile Device (visit the DOWNLOADS page for instructions). The data entered can be imported into Septic Assistant for use in designing the systems and completing the Test-Pit Logging. The data is available for use immediately after submitting the data with the app. There are no files to transfer or manually download, all this is completed automatically.
    • All submitted data is stored in a Cloud based file that is exportable in CSV format. Users have full access to their data only. The data is imported and saved through the Septic Assistant Program, all users however will be emailed DOC & PDF files once the data is submitted (within minutes) without having to use Septic Assistant.
    • Example of usage;1.Open the app and log test-pit(s) on site. (Don’t worry you can go back and add Perc-Test data anytime)2.Initialize Septic Assistant on your computer, select the “USE TEST-PIT LOGGER DATA” button where the data is required.

      3.Select from the “Drop-Down” list that automatically appears, select the Test-Pit you wish to use.

      4.Check the TOGGLE box to save the data to your local drive.

    • I have learned that a large University is working on an Application to read soil colors with a Mobile device, more on this as I get more information. (they are in final approval stages)

    Just added the ability to work

    • Just added the ability to work with classified LAS(z) LIDAR files, taking full advantage of point classifications. User simply downloads a classified LAS file(s) from any source, (ie; “” or “”) Septic Assistant then utilizes a LASTools utility internally to reduce and translate file(s). Data points are then imported into Septic Assistant (utilizing the same method used to import field data that was user collected) for TIN and Contour generation. (scaled and translated points are automatically placed over a scaled and translated GOOGLE IMAGE) No need to learn any other programs or software, GIS software can be quite daunting, time consuming and expansive. Typical vertical precision utilizing LIDAR files is 15cm. (6 inches or better) with the ability to segregate ground elevation points from tree canopy and other obstructions. LAS files are automatically thinned per users requirements, merged and reduced in size to match the GOOGLE IMAGE, reducing LAS files from will over 6million data points to a few thousand.
    • By using available LIDAR data, many other uses of Septic Assistant become evident, for example preparation of site plans & wetlands permitting to name a couple. (program does not replace precise wetland mapping)

    • Added GeoMatrix Geo-Mat systems, all three sizes in lay-down or standup configurations.

    • Refined several functions to acquire ground elevation data directly from the TIN wherever the mouse is located, no need to select any drawing objects.
    • Refined Tank Buoyancy Calculator to take into account tank bottom elevation, original grade and ESHWT elevations at the tank location, there is no need to manually enter any data except depth of cover over the tank (including the use of an extended base, aka anti-flotation tanks).