The Onsite Sewage Facility

There are many diseases that are spread via contact with either untreated sewage or even that which is inadequately treated. Some of them include amoebic dysentery, bacillary dysentery, typhoid, cholera, poliomyletis, shigelosis, hepatitis etc.

Onsite sewage facilities are capable of treating domestic sewage to a very high of quality. When an onsite sewage facility is designed well, installed accurately, operated correctly and maintained periodically, it can prevent disease spread via contaminated surface or groundwater. The main function of septic tanks is to separate solids from liquids, provide an adequate retention time that can facilitate the separation and to enable the anaerobic treatment of waste. If you are worried about the septic tank inspection cost, you should not, because inspecting your septic should be given an importance. 

Onsite Sewage Facility Components

The conventional onsite sewage facility also known as a septic tank has the following basic components:

  •  Inlet baffle/ tee

It is a device that directs all incoming waste stream in the downward direction. It allows the venting of the septic tank via a house plumbing stack and this i with minimum disturbance of septic tank contents.

  •  Compartment divider

This is a barrier that inhibits movement of any solid material i.e. from the first compartment to the second one.

  •  Outlet baffle/ tee

It inhibits movement of both floating and suspended solids from your septic tank and into the drainfield. It draws liquid from the zone that is most clarified.

  •  Outlet filter

There are instances where a filter is put to replace the outlet tee. Its function is to inhibit all solids apart from the fine suspended ones from accessing the pump chamber or drain field.

  •  Covers and access ports

These are openings or ports that are important for observing the condition of the scum layer, sludge depth, tees and baffles.


There are various approaches with regard to an online sewage facility treatment as well as disposal. The alternative types are only utilized in sites whereby the site conditions will work against the conventional online sewage facility. Some of the main alternatives are sand filters, mound systems, standard trenches, pit and vault privies, composting toilets, incineration toilets, aerobic treatment devices and gravel less drain fields.

Design of onsite sewage facility

There are certain elements that have to be looked at in order to have a proper design of an onsite sewage facility, these include the following:

  •  Site evaluation

This involves measurement as well as the preparation of an accurate plot plan that shows the location of various features. It might also include soil logs to determine suitability of the soil with regard to absorption.

  •  System sizing

The size of the onsite sewage facility is based on the sizing of the house and the texture of the soil in the drainfield location.

  •  System location

After sizing the tank, its location is the next item on the agenda. It has to be an area that will not affect other buildings, property lines, water supplies etc.

  • Installation

The proper installation of your onsite sewage facility will guarantee that it provides long-term service. Good practices for installation include proper compaction, accurate levelling and orientation.


Onsite sewage treatments need to be properly used by observing what goes in. This means that measures need to be put in place to ensure that it is operating efficiently throughout.


An onsite sewage treatment facility is cost-effective and long-term system that helps to manage domestic waste. However, it is mandatory that they are properly designed, installed, used and maintained. To ensure that your septic tank is in proper condition, make sure to call a professional just like this one here.


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