Septic Tanks

Septic Tanks

Howarth Timber & Building Supplies can offer a wide range of Septic Tanks and Sewage treatment plants that prove a reliable, economic and efficient solution to your sewage disposal needs. 

What is a Septic Tank?

The term “septic” refers to the anaerobic bacteria that grows within the sludge within the tank environment. This bacteria is necessary as it helps waste to decompose. For this reason, it is advised not to completely remove the sludge as its removal would prevent the decomposition process from taking place.

Therefore, a Septic Tank is a small sewerage treatment system.

Where is a Septic Tank suitable?

Septic Tanks are suitable for areas and individual settlements that are not connected to any of sewerage pipes, and should be located no closer than 7metres to any part of a building that is habited by people, and/or animals.

It is highly recommended that Septic Tanks are only used when a secondary treatment is available. This could be a drainage field or mound, for example.

How big should a Septic Tank be?

For household of up to four people, a Septic Tank should be able to hold at least 2,700 litres, with an extra 180 litres for every other member of a household. At Howarth Timber & Build Supplies, we offer Tanks in various size from 2,800 litres up to 9,000 litres.


It is important to inspect your Septic Tank at least once a month, to ensure that it is working effectively, and any problems sorted out as soon as possible, to avoid too much disruption. Septic Tanks should be emptied at least once a year.

All Septic Tanks meet the standards as set out by BS EN 12566-1:200-: Small wastewater treatment plants less than 50 PE. Part prefabricated Septic Tanks.

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