The design of our Clearwater Sigma Septic Tank delivers a robust, impact-resistant and durable septic tank. Lightweight, watertight and chemically resistant, this unit is ideal for solving your sewage needs, whilst allowing for lower excavation costs.
| Model Reference | Capacity (l) | No. of People | Diameter (mm) | Length (mm) | Standard Inlet Invert (mm) | Standard Outlet Invert (mm) | Depth (mm) |
|---|---|---|---|---|---|---|---|
| STH028 | 2800 | 5 | 1225 | 3022 | 500 | 530 | 1630/1587* |
| STH038 | 3800 | 10 | 1225 | 3901 | 500 | 530 | 1620/1577* |
| STH048 | 4800 | 15 | 1425 | 3774 | 500 | 530 | 1830/1786* |
| STH057 | 5700 | 24 | 1425 | 4274 | 500 | 530 | 1830/1786* |
| STH071 | 7150 | 34 | 1920 | 3225 | 500 | 530 | 2290 |
| STH091 | 9150 | 47 | 1920 | 3957 | 500 | 530 | 2290 |
*110mm Diameter pipework / 160mm diameter pipework
Whether you're planning a new project, looking for product guidance or need support with an existing system, our team is here to help.
Resources
From real-world projects to useful industry knowledge, explore our latest case studies and articles. Gain insight into different applications and keep up to date with the latest developments, ideas and information from across the industry.
The importance of correctly managing wastewater in an off-grid development
Flooding is not a new phenomenon. But increased rainfall and rising sea levels are just some the effects caused by global warming.
Following the expansion of new lodges, Thorney Lakeside Luxury Lodges installed a Klargester BioDisc to comply with local regulations.
Drainage fields are strictly regulated. If your drainage field was installed after January 2000, then it will fall under H2 Building Regulations.
