Poly-Rib Conservancy Tank

The conservancy tank is identical in appearance to our “Poly-Rib” 1.200 litre septic tank, but minus all pipes and fittings. A conservancy tank, by definition, has an inlet but no outlet, and is emptied by means of “honeysucking” through the manhole lid. In the event of a configuration comprising two or more conservancy tanks, the contents of all the tanks may be emptied by accessing the assembly through any one of the manhole lids. Any size may be configured by adding tanks to an assembly. Such assemblies can be either in series or in parallel depending on the availability of space. Conservancy tanks tend to be the most expensive option, in the long run, when deciding on an on-site sewage solution, the reason for this being the on-going expense of “honeysucking” on a regular basis.

• * Capita Support Capacity 1 – unlimited persons (variable)
• * The requirement of a septic tank is that it shall be so designed to retain the volumetric flow for a minimum period of 24 hours, thus should each person dispose of 150 litres per day, the tank would safely support a family of 6 people or, should the disposal be 100 litres per person per day, the tank would support 10 persons, and so forth.

The double-chamber ribbed septic tank, manufactured from rotationally moulded polyethylene, is revolutionary and will withstand outer pressures in excess of any other form of similar product.
The excavation for the tank does not need to be refined, and the same applies to the back-fill after placing the tank into the excavation. We recommend that the tank be filled with water during back-filling of the excavation. The excavation dimensions are length 2,0m, width 1,8m and depth (variable) minimum 1,2m.
The ribbed walls eliminate the necessity for a heavily constructed concrete slab being placed over the top of the tank.
The 450mm diameter manhole allows easy access to workers if the system is poisoned and needs to be cleaned.
The “Poly-Rib” should not be confused with anaerobic digesters or aqua privies. Our product conforms with every norm of the traditional (costly constructed) masonry septic tank and incorporates the following features:

• A baffle with centre transfer hole to secondary chamber
• Scum and sludge barrier
• Two precisely situated and easily accessible inspection eyes
• Dip pipes submerged beneath the fluid level
• Gasses release duct
• A manhole lid with integral double handles and provision for filling with up to 15 kilograms of concrete ballast

View article  “What Is a Conservancy Tank? A Look at the Poly-Rib Solution for Off-Grid Waste Storage in South Africa”