Pros and Cons of Air Injection Filters-You better try Terminox®
The use of air injection in well water that has iron, sulfur, manganese etc. is very common. The main type of air injection filter we see is a filter designed to remove iron. 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. You also see these ﬁlters to remove other unwanted substances such as sulfur and manganese. The downsides of a ﬁlter like this are:
Air is left in the treated well water: If air is in the water as it travels through the home, it can collect in any place that holds water. For example: if you use the water to shower the water brings air into the water tank. When the water stops after the shower there are millions of tiny air bubbles left in the water. These bubbles rise over time and leave a big air bubble in the top of the tank. This can be a lot of air over time that builds up. When the hot water is turned on again, the air can make the pipes “SPIT.” Most homeowners do not like pipes that spit hot water.
Air injection iron ﬁlters and sulfur ﬁlters are susceptible to iron bacteria. To treat the water that contains iron bacteria, you normally must chlorinate the water. Air injection type ﬁlters were never originally designed to remove chlorine so now you must add an additional ﬁlter to remove chlorine. That makes this ﬁlter outdated technology. The most modern ﬁlters, such as Terminox ISM®, oxidize naturally and need no air injection. They also greatly reduce or remove leftover chlorine from the iron bacteria control process.
pH issues: You need a much higher pH water to remove both manganese and iron when both are present in the water supply. Usually it is recommended to have a pH of at lease 8.0 (or higher). The Terminox ISM® water filtration system can work (oxidize) at a much lower pH than 8.0 and is virtually maintenance free.