The Hydrotech AIO 1.5 is an advanced water purification system that will remove iron, manganese, and hydrogen sulphide (rotten egg smell) from a water supply. It will handle up to 30 parts per million (ppm) of incoming iron concentration. It does this within a single tank - saving valuable floorspace and making installation very easy.
The AIO 1.5 is unlike conventional iron removal systems in that it requires no chemicals and uses only air and advanced filtration media to purify the water. The AIO 1.5 is rated for 4 gallons per minute of continuous service and up to 10 gallons per minute for periodic spikes in water usage. This flow rating is based on incoming iron concentrations of about 30 parts per million. When iron is lower than 15 ppm - as is usually the case - this system is ideally suited for a large home or cottage.
How the Hydrotech AIO Iron Water Filter Works:
This system works by passing the incoming water through a bubble of compressed air. As the water passes through the air bubble, it reacts with the oxygen in the air. This reaction takes the dissolved iron, manganese, and hydrogen sulphide and converts them to their particulate form. The filtration media contained inside the AIO system serves multiple purposes. First, this media accelerates the conversion of the water contaminants from a dissolved state to a particle. Secondly, the media acts as a physical barrier and traps these particles, preventing them from entering the home. Lastly, the media slightly increases the pH of the incoming water which greatly enhances the concentration of iron that can be removed.
Over time, the oxygen in the air bubble becomes depleted, and the filtration media inside the tank becomes saturated with particulate iron, manganese and hydrogen sulphide. This typically takes about two days. At this point, the system automatically initiates a backwash cycle where the trapped contaminants are flushed to drain, the old air bubble is expelled, and a new air bubble is drawn in.
A more thorough description of the regeneration process can be found here: Hydrotech AIO Iron Water Filter Manual
Maintenance of the AIO Iron Water Filter:
The AIO 1.5 Iron Water Filter is a very low maintenance piece of equipment. There are no venturi valves to clean as is the case with other air injection systems, no chemicals to add, and on a day to day basis nothing for the home owner to do. This system truly is "set it and forget it". However, due to the nature of iron removal and the type of media that is used inside this system, there are two procedures that will need to be performed over the lifetime of the system:
Piston, Seal, and Spacer Replacement
Inside the control valve of the AIO 1.5 Iron Water Filter there is a piston. During the backwash cycle the piston changes positions to move water in different ways through the AIO system. The piston is a rod-shaped device that sits inside of a channel that is comprised of the seal and spacers. Over time there is wear and tear on the piston and the seal and spacers. Eventually this wear and tear will interfere with the proper functioning of the system. At this point, the piston, seal, and spacers need to be replaced. All AIO 1.5 Iron Water Filters ship with a piston/seal/spacer replacement kit. Replacing these components involves removing the control valve, pulling out the old parts, and inserting the new parts. No specialized tools are required and this swap can be done by anyone with moderate home-repair skills. Under typical operating conditions, this replacement would need to be done about every 5 years.
pH Media Replacement
The filtration media used inside of the AIO 1.5 Iron Water Filter is comprised of three different products. One of these products is a pH boosting media that is used to increase the amount of iron that can be removed by the system. Over time, this pH boosting media is consumed and may need to be replaced in order to ensure proper longterm functioning of the system. When the AIO 1.5 is used under normal water conditions (pH > 6.5) the pH boosting media would need to be replaced after 5 - 10 years. Replacing this media is quite simple. The control valve is removed and a bag of new media is poured into the top of the tank. More information about this pH boosting media can be found here: pH Booster for AIO