Filters
13 items
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Replacement Filters Whole-Home Triple System 20" x 4.5" -
Fluoride Removal Replacement Filters Whole-House Triple System 20" x 4.5" -
Replacement Filter Set for Twin Whole House System 20″ x 4.5″ -
Polyspun Sediment Filter Cartridges - 20" x 4.5" -
High Quality Carbon Block Filter Cartridges - 20" x 4.5" -
Fluoride Filter for Whole House System 20" x 4.5" -
Anti-Scale Carbon Filter 20″ x 4.5″ -
Disruptor® Replacement Filter Cartridge 20"x 4.5" - Model: DIS-2045 -
Aragon Filter Cartridge 20" x 4.5" -
AquaCo Disruptor® Replacement Filter Cartridge 20" x 4.5" - Model: DIS-2045-WAWF -
Antibacterial Pleated Sediment Filter 20" x 4.5" -
Coconut Carbon Block Filter 20" x 4.5" -
AntiScale Carbon Block Filter 20" x 4.5"
Find the correct 20" x 4.5" replacement filters for compatible Aquarius and AquaCo whole-house water filtration systems. For the easiest annual service, start with a complete replacement set that matches the system you own. Individual cartridges are also available when only one filtration stage needs replacing.
Shop by the whole-house system you own
Aquarius Standard Triple System – choose the Aquarius Standard Whole House Replacement Filter Set. The standard set contains a triple-gradient sediment filter, a premium carbon filter and an Aragon filter.
Aquarius Fluoride Removal Triple System – choose the Aquarius Fluoride Removal Whole House Replacement Filter Set. This configuration includes a dedicated fluoride-reduction stage.
Aquarius Twin 20" x 4.5" System – choose the Aquarius Twin Whole House Replacement Filter Set.
AquaCo Three Stage / Aragon system – AquaCo-compatible sediment, carbon and Aragon replacement cartridges are available in the AquaCo 20-inch x 4.5-inch replacement-filter range. Match the cartridge model to your existing system before ordering.
PFAS / Disruptor configurations – use the AquaCo DIS-2045 or DIS-2045-WAWF cartridge specified for your exact system. These are different cartridge models and should not be treated as interchangeable solely because both are 20" x 4.5".
Individual 20" x 4.5" cartridges
Individual options include sediment, carbon block, coconut carbon, anti-scale carbon, fluoride-reduction, Aragon and AquaCo Disruptor cartridges. Cartridge size alone does not identify its filtration function, so check the label or existing cartridge model before replacing it.
Let us match your replacement filters
Send a photo of your system, cartridge label or previous packaging, along with your model or previous order number if available. Ask our team for the appropriate product links before ordering.
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For smaller housings, browse 10" x 4.5" whole-house replacement filters. For every replacement-filter category, visit Replacement Filters.