Fiji Treatment tank installation, coupled to a 5,000 litre primary septic tank. Our Septic Treatment unit consists of aeration, clarification, sludge return and pumpout chamber fabricated in Auckland or flatpacked to be fabricated on site. Dispersal is into a 300mtr surface irrigation field. These units can be supplied prefabricated as a plug in and go unit, or in kitset form to be fabricated on site by the local workforce.more products include Auckland made septic tanks, septic treatment tanks, waste water treatment tanks, skips, detention tanks water tanks, marine tanks, diesel tanks, sewage treatment tanks, pontoons, boats, jetties, pontoon marine systems.