Trusted by South Africans Since 1982
The Poly-Rib septic tank has earned a solid reputation as a household name in the field of on-site sanitation. Since its introduction in 1982, demand for this tank has grown steadily among private homeowners, developers, and commercial operators across South Africa. Designed to be entirely maintenance-free, the Poly-Rib system offers a dependable alternative to traditional masonry septic tanks.
Because of its unique double-chamber, ribbed polyethylene design, this tank supports a variable capita load—from one person to unlimited use cases, depending on waste flow. According to standard calculations, if a person disposes of 150 litres per day, a standard tank easily supports a family of six. On the other hand, if waste disposal is 100 litres per day per person, the system comfortably handles 10 individuals.
Moreover, the Poly-Rib’s superior engineering ensures the retention of sewage for a minimum of 24 hours, as required for effective settling and sludge separation. As a result, it’s a top choice for homes, businesses, and remote sites needing long-lasting, no-fuss waste management.
Robust, Easy-to-Install Construction
What makes the Poly-Rib septic tank truly revolutionary is its structural integrity and ease of installation. Manufactured through rotational moulding, this tank withstands ground pressure far better than traditional alternatives. Its ribbed walls eliminate the need for a concrete slab, making installation simpler, faster, and more cost-effective.
Excavation dimensions are straightforward: 2.0 metres in length, 1.8 metres in width, and a variable depth starting at 1.2 metres. Even better, the tank can be installed without refined excavation or complex backfill procedures. During installation, the tank is filled with water while being backfilled, securing it in place with minimal effort.
In addition to structural advantages, the system features a 450mm diameter manhole for easy access. This allows maintenance personnel to enter the system if cleaning is required—for example, in cases where the system has been poisoned or heavily impacted.
Clearly, this tank sets a high benchmark in performance, durability, and installation efficiency for septic systems across the country.
Designed for Reliability and Function
Unlike anaerobic digesters or aqua privies, the Poly-Rib septic tank conforms to the traditional standards of a well-constructed masonry tank while improving on many of its weaknesses. The design includes multiple reliability-enhancing features that benefit long-term users.
For instance, the double-chamber setup includes a baffle with a centre transfer hole that allows fluid to pass through while keeping solids in place. This is paired with a scum and sludge barrier to prevent clogging and odour problems. The tank is also equipped with two precisely located inspection eyes that make regular monitoring easy and efficient.
Dip pipes submerged beneath the fluid level promote effective flow and prevent backwash. A gas release duct helps vent methane and other gasses safely away from the structure. Finally, the manhole lid includes integral double handles and a cavity for filling with up to 15kg of concrete ballast, ensuring the lid remains secure under all conditions.
Because of these well-thought-out design choices, the Poly-Rib septic tank is more than a product—it’s a dependable solution for residential and commercial on-site sewage needs.
Target Market for GEM Sewage Treatment Plant
