Patent ID: 6248233
Filing Date: 2001-06-19
Classification: C02F,E03B,Y02A

Abstract:
A double pipe cartridge filter for removing heavy metal ions from roof runoff waters comprising:an inner pipe having an upper end and a lower end, said upper and lower ends defining openings, said openings sized so that debris may pass through the inner pipe;an outer pipe having an upper end and a lower end, said outer pipe adapted to be installed in a cast iron gutter pipe that is located above the ground surface of a gutter system, said upper and lower ends being open;said inner and outer pipes connected to one another to define an annular space therebetween, said annular space being open at the top and bottom so that water may flow into the annular space at the top and out of the annular space at the bottom; anda filter material filling the annular space between the inner pipe and the outer pipe.