When it comes to reducing sulfur levels in well water, you should look for injection filters that first oxidize, then remove sulfur gases.
There are two main types of injection filtration systems: air injection and chlorine injection.
Air injection filters ✅
Air injection filters introduce air pockets (containing oxygen) into the water supply, which oxidizes any sulfur gas drawn from your well.
Once oxidized, hydrogen sulfide becomes insoluble, which allows the injection filter to effectively remove it.
Air injection systems will either perform the sulfur oxidization and filtration stages in separate tanks, or they may combine both into a single unit.
By the same process, air injection filters are also an excellent choice for removing other common well water issues, such as:
- Water discoloration, bad tastes, and staining due to iron
- staining caused by manganese
Chlorine injection filters ✅
Sulfur gas also oxidizes when in contact with chlorine. So, even though the chemical is usually associated with disinfecting water, it can also be used to remove sulfur from private wells.
Chlorine systems usually inject chlorine using a feed pump with a meter that regulates deposits. Some combine well water with chlorine in a dedicated tank to increase contact time.
Once oxidized, chlorine injection filters remove sulfur with a filter media in just the same way as air injection filters.
If the system uses lots of chlorine, it may also include an extra carbon filtration stage, which is the most effective way to remove excess chlorine in your drinking water.
Which type of injection filter is best for me?
Chlorine injection systems are often rated to remove very high levels of sulfur gas, making them a good option if your well suffers from extreme sulfur contamination.
However, using a chlorine-based system means adding chemicals to your water supply, and monitoring your feed pump for regular refills.
We’ve also read a significant number of chlorine injection system reviews by people who are unhappy with how noisy their chlorine injectors are.
So, if your filter system is installed inside and near a bedroom, this may be frustrating.
For most people, we recommend air injection sulfur filters over chlorine injection filters:
- Air injection filters are often cheaper than chlorine injection filters
- They’re rated to remove high levels of sulfur than most well owners experience
- It’s tried-and-tested technology
- No added chemicals or replacement cartridges needed