Introduction

The Duo Septic/Settlement tank is a two stage unit that caters for 4 to 50 people. Unlike the main Modulus Sewage Treatment Plants the Duo Septic outlet pipe is required to discharge to an irrigation or soakaway system which requires suitable free draining soil to operate.

Stage 1 : The first stage is the primary or main sludge retention stage where initial septicity of the raw effluent takes place which as a biproduct creates sludge. 

Stage 2 :  Is secondary settlement and final treatment of the effluent before discharge to soakaway system.

Maintenance

Duo Septic tanks need to be maintained on a regular basis and de sludged/emptied annually.

Click on Icon for GA Drawings of Duo Range