Flow through drain filter for a stormwater or wastewater catch basin

摘要

A flow through drain filter for removing trash, sediment, liquid hydrocarbons, and metal ions comprised of at least four concentric screens having a deionizing filter material disposed between an exit screen and a second middle inner screen and hydrophobic and liquid hydrocarbon absorbent material disposed between first and second middle screens and a sediment capture space between the first middle screen and a trash exclusion intake screen.