Replacement Water Filters
Replacement Water Filters
Even the best water filter won’t help if the cartridge isn’t replaced on schedule. We make replacement cartridges to fit standard systems, from sediment and carbon to RO, fluoride and specialty media, most of them right here in the USA.
NOT SURE WHICH FILTER FITS?1-855-508-9561Call a Water Specialist
Shop by Filter Type
24 categories of cartridges, membranes and parts.
Reverse Osmosis Filters
Pre- and post-filters for under-sink RO
Shop Reverse Osmosis →
Reverse Osmosis Membranes
The heart of every RO system
Shop Reverse Osmosis Membranes →
Sediment Depth Filters
Spun polypropylene, 1 to 50 micron
Shop Sediment Depth →
Pleated Sediment Filters
Washable, high-capacity pleats
Shop Pleated Sediment →
Carbon Block & Granular Carbon Filters
Chlorine, taste, odor and VOCs
Shop Carbon Block & Granular Carbon →
Deionization (DI) Filters
Ultra-pure, spot-free water
Shop Deionization (DI) →Calcite Remineralization Filters
Raise pH and add minerals back
Shop Calcite Remineralization →
In-Line Filters
Compact post-filters and fridge lines
Shop In-Line →
Disruptor & Interceptor
Pulsar Disruptor & Interceptor cartridges
Shop Disruptor & Interceptor →
Magna Filters
Cartridges for the Magna system
Shop Magna →
Enpress Filters
Enpress-compatible cartridges
Shop Enpress →Limeblaster Filters
Scale prevention cartridges
Shop Limeblaster →
Chloramine Filters
Catalytic carbon for city water
Shop Chloramine →Fluoride Filters
Fluoride reduction media
Shop Fluoride →Nitrate Filters
Nitrate reduction media
Shop Nitrate →Arsenic Filters
Arsenic reduction media
Shop Arsenic →Polyphosphate Filters
Scale and corrosion control
Shop Polyphosphate →Water Softening Filters
Softening resin cartridges
Shop Water Softening →
Foodservice Filters
Ice machines, coffee and fountain
Shop Foodservice →
Countertop Water Filters
No-install drinking water filters
Shop Countertop Water →Undersink Drinking Water Filters
Point-of-use drinking water
Shop Undersink Drinking Water →
Empty Refillable Filters
Fill with any loose media
Shop Empty Refillable →
Harmsco Filters
Harmsco Hurricane cartridges
Shop Harmsco →
O-Rings Brackets & Wrenches
Housings, wrenches, O-rings
Shop O-Rings Brackets & Wrenches →
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Watts FMRO5 Reverse Osmosis Filters
Watts FMRO5 Reverse Osmosis Filter Pack Watts Water Technologies, Inc. is a supplier of products and solutions that manage and conserve the flow of fluids and energy into, through and out of buildings in the residential and commercial markets. The Company, through its subsidiary,...-
$83.25 - $49.95
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US Water Systems Spun Poly Sediment Filter 4.5" x 10" 20 Micron
US Water Systems Meltblown Spun Poly Sediment Filter - 4.5" x 10" 20 Micron US Water Systems Dual-Gradient Sediment filter cartridges are robust, high efficiency polypropylene melt blown depth filters with an internal polypropylene core for added strength. These filters utilize a multi-layered construction...-
$29.92 - $17.95
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2.5 x 10 Limeblaster Replacement Cartridge | LBC-2510-D
2.5" x 10" US Water Limeblaster Replacement Cartridge The Limeblaster Foodservice Replacement Cartridge prevents scale formation in any water using appliance, water heating device or downstream equipment, to improve efficiency and prolong the life. The Limeblaster media prevents scale by transforming dissolved hardness minerals...-
$41.59 - $24.95
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Limeblaster 2.5" x 19" Replacement Cartridge | 222 Seal
2.5" x 19" US Water Limeblaster Cartridge - 222 Seal Features Pleated design for more surface area Bacteria and chemical resistant Thermally bonded end caps to ensure better sealing Benefits Completely safe for drinking water Easy to fit and low maintenance No electricity needed...-
$68.25 - $40.95
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US Water Chloramine Carbon Block Filter | USWCB-2520-CL
US Water Chloramine Carbon Block Filter 2.5 inch x 20 inch - 1 Micron Filter Filter elements are designed to fit most standard 10” filter housings. This high quality carbon block media is manufactured from raw materials to precise specifications entirely in a US...-
$149.92 - $89.95
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Waterlogix Residential Reverse Osmosis Membrane - 150 GPD
Waterlogix Residential Reverse Osmosis Membrane - 150 GPD are a reliable alternative for your residential reverse osmosis system needs.Waterlogix Membrane Elements are NSF-58 Certified and are manufactured in a state-of-the-art, ISO-9001 compliant automated rolling facility, providing you with precise and advanced membrane quality that delivers on...-
$96.67 - $58.00
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US Water 2.5" x 9.75" Pleated Filter Cartridge 50 Micron
2.5" x 9.75" 50 Micron US Water Polypropylene Filter CartridgeFeatures Pleated design for more surface area Bacteria and chemical resistant Cleanable and reusable in most applications and micron sizes Thermally bonded end caps to ensure better sealing Benefits Lower overall operating cost Longer filter...-
$21.59 - $12.95
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US Water 4.5 x 10 Chloramine Carbon Block Filter Double O-Ring Seal | USWCB-4510-CL-OR
US Water Systems Chloramine Carbon Block Filter 4.5 inch x 10 inch Double O-Ring Seal - 1 Micron Filter Filter elements are designed to fit US Water Systems 10” double o-ring style filter housings. This high quality carbon block media is manufactured from raw...-
$199.92 - $119.95
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US Water Systems Spun Poly Sediment Filter 2.5" x 20" 1 Micron
US Water Systems Meltblown Spun Poly Sediment Filter - 2.5" x 20" 1 Micron US Water Systems Dual-Gradient Sediment filter cartridges are robust, high efficiency polypropylene melt blown depth filters with an internal polypropylene core for added strength. These filters utilize a multi-layered construction...-
$21.59 - $12.95
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Omnipure Inline GAC Filter - K2533-SS
The Omnipure K-Series is a replacement filter body with 1/4 Quick-Connect fittings incorporated into the design. The Omnipure K-Series K2533-SS inline filter features 1/4" Quick-Connect compression fittings that allow for installation and replacement in a matter of seconds without the use of tools. The...-
$41.59 - $24.95
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US Water DI Resin Cartridge 4.5" x 10" 0.8 GPM | USWF-4510-MB
US Water 0.8 GPM 4.5" x 10" Replacement Ultra High Purity DI Cartridge For TDS Reduction Perfect for laboratories, reefkeeping and rinsing or plating operations Deionization cartridges provide solutions for a variety of applications that need the removal of ionic contaminants. Cartridges with mixed...-
$108.25 - $64.95
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Pure-Tel RO-3 And Ro-5 Reverse Osmosis Filters
Pure-Tel RO-3 And Ro-5 Reverse Osmosis Filter Pack Replacement Filter Pack for Pure-Tel RO-3 And Ro-5 5-Stage Reverse Osmosis System All Filters are Made in the USA NSF Certified for Pure-Tel High Purity Reverse Osmosis Systems Fits Pure-Tel RO-3 And Ro-5 Includes (1) 5...-
$83.25 - $49.95
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2.5 x 20 Limeblaster Replacement Cartridge | LBC-2520-D
2.5" x 20" US Water Limeblaster Replacement Cartridge The Limeblaster Foodservice Replacement Cartridge prevents scale formation in any water using appliance, water heating device or downstream equipment, to improve efficiency and prolong the life. The Limeblaster media prevents scale by transforming dissolved hardness minerals...-
$41.59 - $24.95
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Omnipure 1/4" QC GAC Replacement Filter | K2533JJ
The Omnipure K-Series is a replacement filter body with 1/4 Quick-Connect fittings incorporated into the design. The Omnipure K-Series K2533-JJ inline filter features 1/4" Quick-Connect compression fittings that allow for installation and replacement in a matter of seconds without the use of tools. The...-
$41.59 - $24.95
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5-Stage Reverse Osmosis Filter Pack Fits Most Sump-Type RO Systems - 20" Filters
US Water 5-Stage Reverse Osmosis Filter Pack For Systems With 20" Filters All Filters are NSF Certified for High Purity Reverse Osmosis Systems Includes: (1) 5 Micron Pre-Filter (2) Carbon Block Pre-Filter (1) In-Line GAC Post-Filter - 1/4" FNPT Membrane Sold Separately It is...-
$114.92 - $68.95
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US Water Nitrate Removal Filter Cartridge 4.5" x 10" | USWF-4510-NT
4.5" x 10" Nitrate Removal Cartridge Using Nitrate Selective Anion Resin Utilizes FDA Grade high capacity anion exchange resin Removes or Reduces Nitrate Fits any standard big blue 4.5" x 10" Housing Removes Up To 14,449 mg/l ( 845 gpg) before replacement Suggested flow...-
$159.92 - $95.95
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Axeon 5 Stage Reverse Osmosis Filter Pack for RF-5000
Replacement Filter Pack for Axeon 5 Stage Reverse Osmosis Systems Axeon formerly named RO Ultra Tech has been in the water treatment marketplace over 30 years. US Water Systems offers quality USA manufactured compatible filters at a cost savings that will meet or exceed...-
$83.25 - $49.95
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PurelyEZ Replacement 50 GPD Membrane
The PurelyEZ 1812-50 GPD Membrane is a replacement membrane element for the PurelyEZ Residential RO System.-
$40.59 - $24.35
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US Water Fluoride Reduction Filter Cartridge 4.5" x 10" | USWF-4510-BC
US WATER SYSTEMS FLUORIDE REDUCTION FILTER CARTRIDGE 4.5" X 10" 4.5" x 10" Fluoride Removal (4.5" x 10")-US Water Systems USWF-4510-BC Fluoride can occur in drinking water naturally as a result of the geological composition of soils and bedrock. Additional fluoride enters drinking...-
$146.59 - $87.95
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US Water Systems Spun Poly Sediment Filter 2.5" x 20" 20 Micron
US Water Systems Meltblown Spun Poly Sediment Filter - 2.5" x 20" 20 Micron US Water Systems Dual-Gradient Sediment filter cartridges are robust, high efficiency polypropylene melt blown depth filters with an internal polypropylene core for added strength. These filters utilize a multi-layered construction...-
$21.59 - $12.95
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How to Choose a Replacement Filter
Know these three things and you’ll get the right cartridge the first time.
1
Your Housing Size
Most housings take 2.5″ or 4.5″ wide cartridges in 10″ or 20″ lengths. Measure your old filter or check the manual.
2
Your Water Problem
Sediment, chlorine, fluoride and scale each need a different media. Not sure? See our water problems guide.
3
Your Micron Rating
Lower microns catch smaller particles but slow flow and need changing more often.
Replacement Water Filter Cartridge Sizes
2.5″ x 10″SLIM
2.5″ x 20″SLIM
4.5″ x 10″BIG BLUE
4.5″ x 20″BIG BLUE
How to measure: unscrew the housing, pull the old cartridge, and measure across the top for width and down the side for length. Larger commercial sizes are also available, and in-line filters don’t need a housing at all.
Mark Timmons, the Water Doctor, shows how to size a water filter.
Filter Cartridge Options
Spun Polypropylene Sediment →
Sand, silt and rust, 1 to 50 micron
Pleated Sediment →
Washable, high capacity for well water
Granular Activated Carbon (GAC) →
High flow chlorine, taste and odor
Carbon Block →
Finer filtration for drinking water and VOCs
Bone Char →
Fluoride and heavy metal reduction
Calcite →
Raises pH and adds minerals back
Micron Ratings, Explained
A micron is one millionth of a meter. A human hair is about 90 microns wide. Sediment filters are rated from 50 microns down to 0.35 or smaller.
50 µ sand20 µ10 µ pollen5 µ silt1 µ cysts0.5 µ bacteria
FinerCoarser
Lower micron numberCatches smaller particles, but water flows slower and the cartridge fills up sooner.
Tip: stage itPut a coarse 20 to 50 micron filter first and a fine 1 to 5 micron filter after, so the fine one lasts longer.
Can’t Find Your Cartridge?
Send us the size, brand or a photo of your old filter and a certified specialist will match it.
Call 1-855-508-9561