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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US Water Polyphosphate Filter Cartridge 2.5" x 20" | USWF-2520-PP
US Water 2.5" x 20" Phosphate Cartridge The cartridges contain food grade slow melt polyphosphate that dissolves slowly in water to inhibit scale and rust build-up. This type of treatment is recommended for use with ice machines, coffee and vending machines, food service equipment,...-
$91.59 - $54.95
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White Refillable Filter Canister 2.5" x 20"
2.5" X 20" White Empty Refillable Canister for Granular Media Can be used with a wide range of media, including carbon, polyphosphate, calcite, resin and other media. Low cost and reusable. Made with FDA approved food grade polypropylene. Includes foam pad. Volume 109 cubic...-
$15.75 - $9.45
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US Water Big Blue Softening Resin Cartridge 4.5" x 9.75" | U
4.5" x 9.75" Replacement Softening Cartridge For Hardness Reduction Fits Ametek, Pentek, Watts, Flowmatic, Liquatec, Harmsco and most other 4.5" x 10" Housings Ideal Cartridge to Install Pre-RO to Lower Hardness 2,800 Grains Capacity 2 GPM Design flow rate Fits Most 4.5” x 9.75”...-
$73.25 - $43.95
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4-Stage Q Series Replacement Filters
Genuine factory replacement filters fits all Q-Series reverse osmosis systems from PuRO Twist PT-4000, TGI, Topway Global, DuPure, Rayne, PurelyEZ, and ARS Millennium reverse osmosis systems as well as any other reverse osmosis system utilizing Omnipure Q-Series reverse osmosis filters. The PuROTwist 4000 REVERSE...-
$108.25 - $64.95
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US Water Chloramine Removal Cartridge 4.5" x 20" | USWF-4520-CC
4.5" x 20" US Water Chloramine Removal Cartridge with Centaur Carbon Utilizes Centaur Catalytic Carbon to greatly reduce or remove the chloramines in the water supply At the heart of this cartridge is Centaur Catalytic Carbon by Calgon Carbon that combines a fine pore...-
$203.25 - $121.95
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Aqua-Pure APRO5000 Reverse Osmosis Filter Pack
Replacement Filter Pack for Aqua-Pure APRO5000 4-Stage Reverse Osmosis System All Filters are Made in the USA NSF Certified for Aqua-Pure High Purity Reverse Osmosis Systems Fits APRO5000 Includes (1) 5 Micron Pre-Filter (2) Carbon Block Pre-Filter (1) Silicone Packet Membrane Sold Separately It...-
$74.92 - $44.95
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LC30 Reverse Osmosis Filters
LC30 Reverse Osmosis Filter Pack US Water Systems offers quality USA manufactured compatible filters. Replacement Filter Pack that fits Hague® H3000 5-Stage Reverse Osmosis System All Filters are Made in the USA NSF Certified Replacements Includes (1) 5 Micron Pre-Filter (2) Carbon Block Pre-Filters...-
$99.92 - $59.95
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US Water Hi-Flow Pulsar Quantum Disinfection System - 20 GPM
Quantum Disinfection™ is the future of disinfection… and the future is here! Imagine using just a 10 inch filter housing to get bacteria-free, safe, disinfected water, with no electricity, no chemicals, no UV bulbs that have to be disposed of properly because they have...-
$1,665.00 - $999.00
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US Water Arsenic Reduction Cartridge 2.5" x 20" | USWF-2520-AR
US Water Arsenic Reduction Cartridge The USWF Series 20" x 2.5" Arsenic Reduction Filter provides effective Arsenic reduction by utilizing the advanced media technology of ResinTech's ASM-10-HP Arsenic Selective Media which has unsurpassed capacity and is effective over the entire pH range of potable...-
$271.59 - $162.95
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American Plumber WRO-3167 And WSRO20-T Reverse Osmosis Filter Pack
Replacement Filter Pack for American Plumber WRO-3167 And WSRO20-T Reverse Osmosis System All Filters are Made in the USA NSF Certified 42 Includes (1) 5 Micron Pre-Filter (555021-52) (1) Carbon Block Pre-Filter (555021-52) (1) 1/4" NPT In-Line GAC Post-Filter (WIC) (1) Silicone Packet Membrane...-
$74.92 - $44.95
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GoldLine Reverse Osmosis Filter Pack Model 50
GoldLine Reverse Osmosis Filter Pack The Goldline RO is manufactured by Good Water Warehouse out of Fullerton CA. Replacement Filter Pack for GoldLine 5-Stage Reverse Osmosis System. All Filters are Made in the USA NSF Certified Includes (1) 5 Micron Pre-Filter NSF 61 (93023...-
$83.25 - $49.95
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Omnipure K2505-SS Inline Sediment Filter
Omnipure K2505-SS Inline Sediment Filter The Omnipure K2505-SS Inline filter is a 5 micron sediment filter designed with 90° in and out 1/4" Quick Connect. This filter is an ideal sediment filter for the TGI Pure CT445 & CT445P Countertop RO System. This filter...-
$33.25 - $19.95
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Honeywell RO-5 And RO-9100 Reverse Osmosis Filters
Honeywell RO-5 And RO-9100 Reverse Osmosis Filter Pack US Water Systems offers quality USA manufactured compatible filters at a cost savings that will meet or exceed Honeywell specifications. All Filters are Made in the USA NSF Certified for Honeywell High Purity Reverse Osmosis Systems...-
$83.25 - $49.95
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US Water 4.5" x 30" Pleated Filter Cartridge 5 Micron - 222 Seal
4.5" x 30" 5 Micron US Water Polyester Filter Cartridge - 222 SealFeatures 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...-
$113.25 - $67.95
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Granular Activated Carbon 2.75" x 9-7/8" Filter Cartridge | GAC-10 - Case of 25
Water Washed Coconut Shell Granular Activated Carbon 2.75 x 9-7/8"Replacement Filter CartridgeRated at 1 GPM Flow Rates2,500 Gallon CapacityCase Quantity : 25-
$581.25 - $348.75
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Topway Global TGI-WIN-545P Reverse Osmosis Filter Pack | 201-FP5-3
Replacement Filter Pack for TGI Pure Model TGI-WIN-545P 5-Stage Reverse Osmosis System Topway Global, established in 1993, manufactured a wide variety of water softeners, point-of-entry filter units and point-of-use drinking water systems for residential, commercial, and industrial applications. In 2007 Watts Water Technologies acquired...-
$91.59 - $54.95
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Ametek Kleen Plus RO-2127, WSRO10C, And HDRO-10AG Reverse Osmosis Filter Pack
Replacement Filter Pack for Ametek Kleen Plus RO-2127, WSRO10C, And HDRO-10AG 3-Stage Reverse Osmosis System like the one pictured All Filters are Made in the USA NSF Certified for Ametek Global High Purity Reverse Osmosis Systems Includes (1) 5 Micron Pre-Filter (155225-43 Compatible)) (1)...-
$58.25 - $34.95
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Granular Activated Carbon 2.75" x 20" Filter Cartridge | GAC20
Water Washed Coconut Shell Granular Activated Carbon 2.75" x 20" Replacement Filter Cartridge Rated at 1 GPM Flow Rates 5,000 Gallon Capacity Replaces IF-SM-GAC020-
$44.92 - $26.95
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White Refillable Filter Canister 2.5" x 10" | RC-W-975
2.5" X 10" (9.75") White Empty Refillable Canister for Granular Media Can be used with a wide range of media, including carbon, polyphosphate, calcite, resin and other media. Low cost and reusable. Made with FDA approved food grade polypropylene. Includes foam pad. Volume 49...-
$6.59 - $3.95
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Ametek RO-3167, WRO-3167, WSRO20-T Reverse Osmosis Filter Pack
Replacement Filter Pack for Ametek RO-3167, WRO-3167, WSRO20-T 3-Stage Reverse Osmosis System like the one pictured All Filters are Made in the USA NSF Certified for Ametek Global High Purity Reverse Osmosis Systems Includes (2) Carbon Block Pre-Filter (155132-43) Membrane Sold Separately It is...-
$49.92 - $29.95
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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