The Sewage treatment plant 12 population pumped outlet E-Range is easy to maintain as there are no mechanical parts or electrical components within the main body of the tank, with exception of the pumped outlet. The tank is supplied with a low visibility locked child proof pedestrian cover, external blower housing, integral pump and internal pipework. The sewage treatment process takes place within the main body of the tank. Firstly coarse solids are filtered and retained for gradual breakdown. The resulting liquid is then continuously distributed over a plastic suspended filter by an integral lift, powered by the externally housed blower (air compressor). Finally the solids are allowed to settle, and the treated effluent is discharged by means of integral pump with 50mm compression outlet. Manufactured by Clearwater from glass reinforced plastic (GRP) and certified to EN 12566 - building regulation compliant. The Overall dimensions are 1900mm diameter x 2700mm high including 1000mm invert level.