Air injection system combined with high grade manganese dioxide (commonly called Mang-Ox or Filox) provides the highest removal capacity for iron without chemicals. Advanced single tank pump-free design lowers cost, reduces maintenance, and provides a smaller footprint than standard systems that use air pumps or separate tanks. Designed and backed by AFWFilters - a long standing member of the Water Quality Association, Certified Water Specialist on staff, and over 35 years of combined experience to help ensure the best solution for YOUR water.