The AdEdge AD4510S Point of Use Water Filter is a drop-in arsenic reduction replacement filter for large diameter filtration systems like Aqua-Pure's AP801B, APWC801 or Pentek Big Blue systems. AdVantEdge's design utilizes the AdEdge proprietary iron oxide adsorption media for long life and unparalleled performance to meet the challenges of the 10 micrograms/l drinking water standard for arsenic established by the EPA. The product effectively reduces both Arsenic (V) and Arsenic (III) without pre-oxidation. Ideal applications include under-counter and countertop POU systems. Application: Ideal for 4 1/2" x 10" whole house systems Arsenic Reduction: Reduction of up to 99% of Arsenic. Effective for both ( III ) and ( V ) Certifications: NSF 61 Capacity: 1000-3000 gallons Specifications Dimensions: 4.5 x 9.75 inch Media Type: AD33L Iron Oxide Contaminant Reduction: Arsecnic ( V ) and ( III ) Cartridge Life: 1000 Gallons up to 100 micrograms/l arsenic; 3000 Gallons up to 50 micrograms/l Cartridge Shell: FDA Grade Polyethylene Micron Rating: 25 Micron Nominal Pressure Drop: < 8 psi @ 0.5 gpm Recommended Water Quality for Best Performance pH: 6.5 - 8.5 Iron: < 0.5 mg/l Manganese: < 0.05 mg/l Arsenic (V) and (III): 100 micrograms/l Silica: < 30 mg/l Sulfate: < 100 mg/l Phosphate: < 0.5 mg/l Sulfides: < 0.1 mg/l Fluoride: < 1 mg/l