Do Air Injection Iron Filters Work

They market these as chemical free iron filters and some do work.

Do air injection iron filters work. Pre oxidation can come from aeration chlorine or peroxide injection ozone and other methods. When iron is oxidized it is much easier to filter out of the water by the iron blend media and once hydrogen sulfide is oxidized the gas is released inside the filter instead of inside of your home. It seems that these days everyone in the water treatment business is selling an air injection iron filter. City water treatment departments all use chlorine.

The main type of air injection filter we see is a filter designed to remove iron. Pre oxidation is required in cases where the dissolved oxygen content is too low. Each night the iron filter back washes and then draws air in during the backwash process. Once the oxygen is induced into the water line and then into the pressure tank for contact time iron and manganese will be oxidized.

Most chemical free iron filters and several chemical filter media require some dissolved oxygen in the water to act as a catalyst. Pre treatment aka oxidation pre treatment involves using an oxidant to cause contaminants in the water to precipitate and settle out. Air injection iron filters do not work on water that contains significant amounts of iron and or iron or sulfur reducing bacteria. They add hardness to the water and should be followed by a water softener.

Before i really start let me preface this with. Iron filters use a 3 step process. Air is free you can t run out if you do run out of air you ll have more serious problems than iron stains and it doesn t add any chemicals to the water. Air injection is by far our most popular pre treatment method for iron filter systems.

Then they may fail sooner. Air injected iron filters chlorine injected iron filters greensand filters and pyrolox filters all follow a 3 step process. The truth about air injection iron filters. The durawater iron eater filter is our top selling iron filter and utilizes air injection to oxidize the iron and hydrogen sulfide which causes the rotten egg smell.

I know some of you have air injection filters that you swear work really well however what works for you may not work for everyone. Air charger iron filters maintain a head of air at the top of the iron filter tank. Most of the air injection filters made today use some type of venturi to induce air in front of the existing pressure tank once. Chlorine is a more powerful oxidant and is our second choice.

Figure 1 fouled by air injection system ph media needs to be added regularly to maintain the system. This particular filox iron filter used an air charger control valve which keeps a head of air at the top of the filter tank. As the water enters the tank it falls through air trapped inside the top of the filter tank. Air injected iron filters use oxygen to oxidize iron and manganese.

The filter is then designed to remove the oxidized iron and manganese. Air is injected into the water line and then the air injected water goes into a tall thin filter tank that collects the sedimentary iron and periodically cleans itself of the iron sediment it has collected and sends it down the drain.