CLIENT BRIEF: My “old” concrete sand filter is crumbling and constantly blocking. I need to upgrade and treat the waste from my standard septic tank and disperse into the irrigation field. PROBLEM SOLVED: The TJ3375 AERATION UNIT. 3375 litres of oxygen diffusion. Counter current flowing water created by millions of tiny oxygen bubbles, forced through our ceramic diffuser stones, ensuring excellent air-water contact for the scrubbing of undesirables from the liquid. This septic treatment tank was custom built for a local client in West Auckland and installed by Wai Water, Septic Tank Maintenance Service. Ease of maintenance, simplicity and durability are the key ingredients we aim to achieve with all our custom septic treatment tanks.