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Best Selling Water Filtration Products

Explore best-selling water filtration products chosen by customers for drinking water, whole-house treatment, replacement filtration, and system maintenance. Compare product type, capacity, dimensions, certifications, and compatibility to find proven options that fit your water quality goals and existing equipment.

Filters

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Alkaline Remineralization pH Inline Water Filter Fits Any RO, 1/4" NPT Ports - IFilters
Hydronix

Alkaline Remineralization pH Inline Water Filter Fits Any RO, 1/4" NPT Ports

ICF-2512-ALK

$40.42 - $40.42
$40.42
$40.42 - $40.42
$40.42

Increase the pH of your filtered water and add healthy minerals back into your body. Remineralize your water by installing this easy-to-install Inl...

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$40.42 - $40.42
$40.42
$40.42 - $40.42
$40.42
O-Ring For HF2, HF3 and HF4 Filter Housings - IFilters
Hydronix

O-Ring For HF2, HF3 and HF4 Filter Housings

HF2/3-ORING
in stock

$0.59 - $0.59
$0.59
$0.59 - $0.59
$0.59

Replacement O-Ring for the Hydronix HF2, HF3 and HF4 filter housings. These replacement O-Rings are made to be used with the Opaque or Clear HF2, H...

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$0.59 - $0.59
$0.59
$0.59 - $0.59
$0.59
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Hydronix CB-25-1005 Whole House RO Drinking Water Coconut Carbon Block Water Filter 5 m 2.5" x 10"
Hydronix CB-25-1005 Whole House RO Drinking Water Coconut Carbon Block Water Filter 5 m 2.5" x 10"
Hydronix

Hydronix CB-25-1005 Whole House RO Drinking Water Coconut Carbon Block Water Filter 5 m 2.5" x 10"

CB-25-1005
in stock
$10.99 - $10.99
$10.99
$10.99 - $10.99
$10.99

Hydronix CB-25-1005 Whole House RO Coconut Carbon Block Water Filter – 5 Micron, 2.5" x 10" Premium Carbon Block Filtration for Cleaner, Better-Tas...

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$10.99 - $10.99
$10.99
$10.99 - $10.99
$10.99
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2 Pack Compatible Fit Frescapure 4000 4500 5000 6000 Water Filter Replacement
Smart Pack

Smart Pack Royal Prestige Replacement Filter – 0.5 Micron Coconut Shell Carbon Block Under-Sink Water Filter 2-Pack

RP-CB456505/2
in stock

$99.99 - $99.99
$99.99
$99.99 - $99.99
$99.99

Enjoy cleaner, better-tasting water with the Smart Pack Royal Prestige Carbon Block Replacement Filter 2-Pack. Designed for FrescaPure 4000, 4500, ...

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$99.99 - $99.99
$99.99
$99.99 - $99.99
$99.99
Aquatrol TD-1203 Top Upper Distributor Fine Mesh Basket – Fits 1.05" Riser Tubes
Aquatrol

Aquatrol TD-1203 Top Upper Distributor Fine Mesh Basket, Aquatrol, Fleck, Clack, Autotrol, 1.05" ID

TD-1203
in stock

$8.50 - $8.50
$8.50
$8.50 - $8.50
$8.50

Aquatrol TD-1203 Top Upper Distributor Fine Mesh Basket – Fits 1.05" Riser Tubes The Aquatrol TD-1203 Top Upper Distributor Fine Mesh Basket is a h...

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$8.50 - $8.50
$8.50
$8.50 - $8.50
$8.50
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Whole House Reverse Osmosis Sediment Water Filter Cartridge 2.5" x 10" - 5 μm - IFilters
Hydronix

Whole House Reverse Osmosis Sediment Water Filter Cartridge 2.5" x 10" - 5 μm

SDC-25-1005
in stock
$7.00 - $7.00
$7.00
$7.00 - $7.00
$7.00

Hydronix SDC-25-1005 polypropylene sediment filters have a particle retention Size of 5 microns and are used in residential and commercial water fi...

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$7.00 - $7.00
$7.00
$7.00 - $7.00
$7.00
SPV-40CAP34 End Cap for Hydronix SPV-4040-34 RO Vessel, 1pc - IFilters
Hydronix

SPV-40CAP34 End Cap for Hydronix SPV-4040-34 RO Vessel, 1pc

SPV-40CAP34
in stock

$19.99 - $19.99
$19.99
$19.99 - $19.99
$19.99

Hydronix End Cap for Hydronix SPV-4040-34, 4" with 3/4" Feed Port and 1/2" Brine, Black This Hydronix end cap is made from Glass Reinforced Polyami...

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$19.99 - $19.99
$19.99
$19.99 - $19.99
$19.99
FLK-PAD Variations
FlowLok

Replacement Pads for Flowlok Leak Detector Safety Valve, 2 Pack

FLK-PAD-2
in stock

$9.99 - $9.99
$9.99
$9.99 - $9.99
$9.99

Flowlok leak detector replacement pads. Pack of 2. The Flowlok leak detector automatically shuts off the water when a leak occurs. This Flowlok dev...

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$9.99 - $9.99
$9.99
$9.99 - $9.99
$9.99
PRO+AQUA RV Filter and Water Softener Regeneration Kit for Sediment, Chlorine, Odor, Taste - IFilters
PRO+AQUA RV Filter and Water Softener Regeneration Kit for Sediment, Chlorine, Odor, Taste - IFilters
PRO+AQUA

PRO+AQUA RV Filter and Water Softener Regeneration Kit for Sediment, Chlorine, Odor, Taste

WS-P-REG-KITV2
Out of stock

$62.00 - $62.00
$62.00
$62.00 - $62.00
$62.00

This system is used as a pre-filter when filling your RV/Boat tank and used as a regeneration kit when regenerating your water softener. Great for ...

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$62.00 - $62.00
$62.00
$62.00 - $62.00
$62.00
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Reverse Osmosis Replacement Filter Set RO Cartridges 5 pcs, 75 GPD Membrane, QC - IFilters
Smart Pack

Reverse Osmosis Replacement Filter Set RO Cartridges 5 pcs, 75 GPD Membrane, QC

RO-75KITQ
in stock

$39.95 - $39.95
$39.95
$39.95 - $39.95
$39.95

5 Stage NSF Reverse Osmosis RO Replacement Water Filter Set with 75 GPD Membrane. For any standard RO system. Sediment, GAC, CTO, Membrane & GA...

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$39.95 - $39.95
$39.95
$39.95 - $39.95
$39.95
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Drinking Water Replacement Filter Set for 3 stage Filtration Systems - IFilters
iFilters

Drinking Water Replacement Filter Set for 3 stage Filtration Systems

IFD-U3PK
in stock

$38.99 - $38.99
$38.99
$38.99 - $38.99
$38.99

The IFD-U3PK combines Sediment filtration with GAC and KDF to filter and reduce heavy metals as well as chlorine, taste, and odor found in city and...

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$38.99 - $38.99
$38.99
$38.99 - $38.99
$38.99
Hydronix FW-1 Wrench for HF2 / HF3 / HF4 Series Housings - IFilters
Hydronix FW-1 Wrench for HF2 / HF3 / HF4 Series Housings - IFilters
Hydronix

Hydronix FW-1 Wrench for HF2 / HF3 / HF4 Series Housings

FW-1
in stock

$0.00 - $0.00
$0.00
$2.80
$2.80 - $2.80
$2.80

The FW-1 wrench fits HF2 / HF3 / HF4 Series Hydronix Housings

$0.00 - $0.00
$0.00
$2.80
$2.80 - $2.80
$2.80
Polaris Scientific Ultraviolet Water UV System New Style Ballast, 24W - 39W 110v - IFilters
Polaris Scientific

Polaris Scientific Ultraviolet Water UV System New Style Ballast, 24W - 39W 110v

BEB-2439
in stock

$41.74 - $41.74
$41.74
$41.74 - $41.74
$41.74

Polaris Scientific BEB-2439 ballast for the UVA-6C, UVA-8C and UVA-12C Ultraviolet UV Systems. 24W-39W 110V/220V Used with the GL24PP, GL32PP and ...

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$41.74 - $41.74
$41.74
$41.74 - $41.74
$41.74
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Hydron - TW-2012-100 - Membrane
Hydron

Hydron - TW-2012-100 - Reverse Osmosis Membrane 100 GPD Reverse Osmosis DI RO Membrane Replacement Filter, Fits Standard Systems

TW-2012-100
in stock

$29.00 - $29.00
$29.00
$29.00 - $29.00
$29.00

The Hydron TW-2012-100 Reverse Osmosis membrane produces 100 gallons per day and is designed for home drinking water, DI systems, office and certai...

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$29.00 - $29.00
$29.00
$29.00 - $29.00
$29.00
Shok Blok Filter Protection Valve, 40psi, 3/8" - IFilters
Pressure Regulator Protection Valve for RO & Filter Systems, 1/4" QC, 40 PSI
Shok Blok

Shok Blok Filter Protection Valve, 40psi, 3/8"

SB-FPV-40/38
in stock

$13.25 - $13.25
$13.25
$13.25 - $13.25
$13.25

SHOK BLOK Filter Protection Valves are you best choice for protecting and limiting water pressure to your water filtration device. This SHOK BLOK M...

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$13.25 - $13.25
$13.25
$13.25 - $13.25
$13.25
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(6 Pack) Hydronix SGC-25-1005 Sediment Filter Grooved Cartridge 2.5" x 10" 5 micron - Interchangeable with AP110 Model
(6 Pack) Hydronix SGC-25-1005 Sediment Filter Grooved Cartridge 2.5" x 10" 5 micron - Interchangeable with AP110 Model
Hydronix

(6 Pack) Hydronix SGC-25-1005 Sediment Filter Grooved Cartridge 2.5" x 10" 5 micron - Interchangeable with AP110 Model

SGC-25-1005/6
in stock
$18.20 - $18.20
$18.20
$18.20 - $18.20
$18.20

Hydronix SGC-25-1005 filter cartridges are 2.5” dia x 9.875” L and are made of 100% pure polypropylene material. Hydronix SGC-25-1005 filters are d...

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$18.20 - $18.20
$18.20
$18.20 - $18.20
$18.20
Polaris Scientific UV GLHO48PP High Output Ultraviolet Replacement Lamp for UVA-418HO - IFilters
Polaris Scientific GLHO48PP – High Output Ultraviolet Replacement Lamp for UVA-418HO
Polaris Scientific

Polaris Scientific UV GLHO48PP High Output Ultraviolet Replacement Lamp for UVA-418HO

GLHO48PP
in stock

$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95

Polaris Scientific GLHO48PP – High Output Ultraviolet Replacement Lamp for UVA-418HO The Polaris Scientific GLHO48PP is a high-output germicidal UV...

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$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95
iFilters O-Ring Fits Any BB Housing Buna-N, 3 Pack - IFilters
iFilters

iFilters O-Ring Fits Any BB Housing Buna-N, 3 Pack

ORING-45/3
in stock

$11.19 - $11.19
$11.19
$11.19 - $11.19
$11.19

This 3 pack O-Rings by iFilters are used to seal water filter housings. It has an ID of 5-1/2" and OD of just over 5-3/4 inches and is made of nitr...

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$11.19 - $11.19
$11.19
$11.19 - $11.19
$11.19
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(6 Pack) Hydro Guard HDG-P117/6 Premium GAC Water Filter Cartridge - Interchangeable with AP117
(6 Pack) Hydro Guard HDG-P117/6 Premium GAC Water Filter Cartridge - Interchangeable with AP117
Hydro Guard

(6 Pack) Hydro Guard HDG-P117/6 Premium GAC Water Filter Cartridge - Interchangeable with AP117

HDG-P117/6
in stock

$41.60 - $41.60
$41.60
$41.60 - $41.60
$41.60

(6 Pack) Hydro Guard HDG-P117/6 Premium GAC Water Filter Cartridge – AP117 Compatible Replacement The (6 Pack) Hydro Guard HDG-P117/6 Granular Acti...

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$41.60 - $41.60
$41.60
$41.60 - $41.60
$41.60
Countertop Ultra Drinking Water Filter For VOCs Chlorine, White
Countertop Ultra Drinking Water Filter For VOCs Chlorine, White
iFilters

Countertop Ultra Drinking Water Filter For VOCs Chlorine, White

CNTP-1W
in stock

$49.95 - $49.95
$49.95
$49.95 - $49.95
$49.95

NOTE: Our faucets are NSF certified, Safe for Drinking Water and comply with NSF/ANSI Standard 372 for low-lead content, meeting the strict require...

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$49.95 - $49.95
$49.95
$49.95 - $49.95
$49.95
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RO Post Polishing Fridge Ice Inline Coconut GAC Water Filter, 2000 Gal, 1/4" NPT
Hydronix

RO Post Polishing Fridge Ice Inline Coconut GAC Water Filter, 2000 Gal, 1/4" NPT

ICF-10
in stock
$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00

Hydronix ICF-10 inline coconut shell carbon filters have 1/4" npt connections and are suitable for drinking water filtration applications. The coco...

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$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00
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Smart Pack

Hydronix Compatible Culligan AC-30 AC-15 RO 3 Filter Replacement Set for Reverse Osmosis Drinking Water System, 12.5x5x1.9, White

RO-CUL-3
in stock
$23.75 - $23.75
$23.75
$23.75 - $23.75
$23.75

Reverse Osmosis (RO) Replacement water filters for AC-30 (AC30) and AC-15 (AC15) Reverse Osmosis (RO) Systems. Includes Sediment, Carbon Block and ...

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$23.75 - $23.75
$23.75
$23.75 - $23.75
$23.75
FW-3 Big Blue Size Housing Wrench - IFilters
FW-3 Big Blue Size Housing Wrench - IFilters
Hydronix

FW-3 Big Blue Size Housing Wrench

FW-3
in stock

$6.00 - $6.00
$6.00
$6.00 - $6.00
$6.00

The FW-3 Wrench can be use to loosen Big Blue or Big Blue style filter housings when changing filters. The spanner wrench has four teeth. This FW-3...

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$6.00 - $6.00
$6.00
$6.00 - $6.00
$6.00
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SW5-4520 String Wound Sediment Water Filter Whole House or Commercial, 4.5 x 20, 5 Micron - IFilters
SW5-4520 String Wound Sediment Water Filter Whole House or Commercial, 4.5 x 20, 5 Micron - IFilters
iFilters

SW5-4520 String Wound Sediment Water Filter Whole House or Commercial, 4.5 x 20, 5 Micron

SW5-4520
in stock

$25.99 - $25.99
$25.99
$25.99 - $25.99
$25.99

The SW5-4520 Polypropylene String Wound Filters has a particle retention Size of 5 micron and are used in a residential and commercial water filt...

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$25.99 - $25.99
$25.99
$25.99 - $25.99
$25.99
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