FD12 Waterway Plastics DE Filter, Waterway Clearwater, 44 GPM, 12 sqft, 1-1/2" $585.43 FD12 Waterway Plastics DE Filter, Waterway Clearwater, 44 GPM, 12 sqft, 1-1/2"Alt. Part Numbers: FD12-7, FD044, 806105282293SPECSDE Required: 1.2 lbs.