Franklin 10" x 4.5" OD Spun Poly Filter Cartridge, NSF 42 Certified (FWPS Series)

Product Overview The Franklin 10" x 4.5" OD FWPS Series Spun Poly Filter Cartridge is built for high-capacity sediment filtration in residential, commercial, and industrial water systems. Constructed from 100% melt-blown polypropylene using thermal fusion technology, this cartridge contains no glues, binders, or additives that could contaminate the water supply. Its advanced three-layer density structure uses larger outer fibers and finer inner fibers to maximize contaminant retention while maintaining low pressure drop and high flow performance. This design allows the cartridge to effectively capture sediment, sand, rust, scale, and suspended solids while extending service life. The large 4.5" OD “Big Blue” style construction provides significantly higher flow rates and dirt-holding capacity compared to standard slimline cartridges, making it ideal for whole-house filtration and demanding water treatment applications. Key Features Large 4.5" OD Big Blue style cartridge for higher flow capacity Three-layer density design improves sediment retention 100% polypropylene construction for chemical resistance Thermally bonded without adhesives or binders High dirt-holding capacity for longer filter life Low pressure drop improves system efficiency Resistant to bacterial attack NSF 42 and FDA CFR Title 21 certified Applications Whole-house water filtration Potable drinking water systems Reverse osmosis pre-filtration Commercial water treatment Food & beverage processing Process water filtration Chemical processing systems Specifications Specification Detail Series FWPS Series Cartridge Length 10" Outside Diameter 4.5" Media 100% Melt-Blown Polypropylene Construction Thermal Bonded Max Operating Temperature 65°C (150°F) Nominal Replacement Pressure Drop 1.5 Bar (22 PSI) Maximum Pressure Drop @ 20°C 3.2 Bar (46.4 PSI) Maximum Flow Rate 6–20 GPM Micron Ratings Available 1, 5, 20, 50 Micron Certifications NSF 42, FDA CFR Title 21 Frequently Asked Questions What contaminants does this filter remove? The FWPS Series helps reduce sediment, rust, dirt, sand, scale, and suspended particulate from water systems. What is the benefit of the 4.5" OD design? The larger diameter increases dirt-holding capacity and allows for higher flow rates with lower pressure drop. Does this filter contain glue or adhesives? No. The cartridge is thermally bonded without binders, adhesives, or chemical glues. Is this filter safe for drinking water systems? Yes. The cartridge is NSF 42 certified and compliant with FDA CFR Title 21 requirements. Can this cartridge be used for whole-house filtration? Yes. The Big Blue style design is commonly used in whole-house and commercial filtration systems requiring higher flow capacity.