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Shop All Water Filters, Parts & Systems

Fresh, dependable water starts with the right setup, and iFilters makes it easy to find what fits your space. Water Filters, Parts & Systems in this collection cover everyday drinking needs, whole-home protection, and jobsite-ready solutions for commercial and industrial use. Browse by product type, filter size, or compatibility so replacements and upgrades stay simple. Options span sediment, carbon, reverse osmosis, and UV, giving you a clear path from problem to solution. Fast shipping and helpful support keep your project moving.

About iFilters Water Filtration Products

iFilters brings a one-stop catalog together, from complete whole-house filtration systems to specialized drinking water systems for sinks and dispensers. Commercial systems help support higher flow demands, while replacement filters keep performance consistent between service intervals. Parts like housings, fittings, adapters, and power supplies help you maintain, repair, or expand an existing setup without guesswork. Ultraviolet systems add an extra layer for applications that benefit from UV treatment. Tools and specialty systems round out the collection for unique installs, seasonal needs, and niche use cases.

Why Choose iFilters for Water Filtration Gear?

Confidence comes from selection, and this store is built around breadth and compatibility across many brands and applications. Auto Ship subscriptions make routine replacements easier, while discounts help reduce long-term ownership costs. Expert support is available when you need help choosing the right part, matching a cartridge, or planning a system refresh. Free shipping starts at qualifying order thresholds, and a satisfaction guarantee adds peace of mind at checkout.

Shop water filtration systems and parts online today!

Filters

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O-Ring For HF45 Filter Housing - IFilters
Hydronix

O-Ring For HF45 Filter Housing

HF45-ORING
in stock

$2.55 - $2.55
$2.55
$2.55 - $2.55
$2.55

Replacement O-Ring for the Hydronix HF45 filter housings. Made from durable Buna-N material. This replacement O-Ring is made to be used with the Op...

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$2.55 - $2.55
$2.55
$2.55 - $2.55
$2.55
Aquatrol - AQT-TH1-25 - 1" In and Out Water Softener or Filter Head For 2.5" Port Tanks
Aquatrol

Aquatrol - AQT-TH1-25 - 1" In and Out Water Softener or Filter Head For 2.5" Port Tanks

AQT-TH1-25
in stock

$24.95 - $24.95
$24.95
$24.95 - $24.95
$24.95

Aquatrol AQT-TH1-25 – 1" In & Out Water Softener or Filter Head for 2.5" Port Tanks The Aquatrol AQT-TH1-25 Water Softener & Filter Head is...

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$24.95 - $24.95
$24.95
$24.95 - $24.95
$24.95
Auto Ship
iFilters Sediment Grooved Water Filter Cartridge - 2.5" x 10" - 5 Micron - Interchangeable with AP110 Model - IFilters
iFilters

iFilters Sediment Grooved Water Filter Cartridge - 2.5" x 10" - 5 Micron - Interchangeable with AP110 Model

SG5-2510
in stock

$8.57 - $8.57
$8.57
$8.57 - $8.57
$8.57

The iFilters SG5-2510 measure 2.5" x 9.875" (2.5" x 10" standard) and are made of 100% pure polypropylene material. The iFilters SG5-2510 filters h...

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$8.57 - $8.57
$8.57
$8.57 - $8.57
$8.57
Auto Ship
(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
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
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
Hydronix HF3-CAP34BKPR Black Rib Cap with 3/4" NPT Ports & Pressure Relief Button
Hydronix

Hydronix HF3-CAP34BKPR Black Rib Cap with 3/4" NPT ports and Pressure Relief buttons

HF3-CAP34BKPR
in stock

$6.99 - $6.99
$6.99
$6.99 - $6.99
$6.99

Hydronix HF3-CAP34BKPR Black Rib Cap with 3/4" NPT Ports & Pressure Relief Button The Hydronix HF3-CAP34BKPR is an OEM replacement cap designed...

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$6.99 - $6.99
$6.99
$6.99 - $6.99
$6.99
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
Auto Ship
Hydro Guard HDG-CB-8-38 (CB8), Amway E84, A101, E-9225 Compatible Carbon Block Water Filter
Hydro Guard

Hydro Guard HDG-CB-8-38 (CB8), Amway E84, A101, E-9225 Compatible Carbon Block Water Filter

HDG-CB-8-38
in stock

$35.84 - $35.84
$35.84
$35.84 - $35.84
$35.84

Hydro Guard HDG-CB8-38 Carbon Block Water Filter – Compatible with CB8, Amway E84, A101, & E-9225 The Hydro Guard HDG-CB8-38 Carbon Block Water...

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$35.84 - $35.84
$35.84
$35.84 - $35.84
$35.84
Auto Ship
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Inline RO Post Fridge Ice Coconut GAC Water Filter 2000 Gal, 1/4" Quick Connect - IFilters
Hydronix

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

ICF-10Q
in stock

$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00

This Hydronix ICF-10Q inline coconut filter has 1/4" quick-connect connections and is suitable for drinking water filtration applications. This NSF...

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$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00
Auto Ship
Culligan CW5-BBS Compatible 5-Micron Sediment Cartridge – HD-950 Housing Replacement
Culligan

Culligan CW5-BBS Compatible 5-Micron Sediment Cartridge

CW5-BBS
in stock

$0.00 - $0.00
$0.00
$14.99
$14.99 - $14.99
$14.99

Culligan CW5-BBS Compatible 5-Micron Sediment Cartridge – HD-950 Housing Replacement The Culligan CW5-BBS Compatible 5-Micron Sediment Cartridge is...

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$0.00 - $0.00
$0.00
$14.99
$14.99 - $14.99
$14.99
Auto Ship
6 PACK - Sediment Pleated Water Filter - Washable & Reusable, 4.5" x 10", 20 μm
6 PACK - Sediment Pleated Water Filter - Washable & Reusable, 4.5" x 10", 20 μm
Hydronix

6 PACK - Sediment Pleated Water Filter - Washable & Reusable, 4.5" x 10", 20 μm

SPC-45-1020/6
in stock

$75.00 - $75.00
$75.00
$75.00 - $75.00
$75.00

Hydronix SPC series 4.5" x 10" 20 micron polyester pleated cartridges are manufactured from durable polyester to provide you with a superior pleate...

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$75.00 - $75.00
$75.00
$75.00 - $75.00
$75.00
Polaris Scientific UV Ultraviolet Replacement Lamp, Germicidal Lamp, 10W 4 Pin
Polaris Scientific UV Ultraviolet Replacement Lamp, Germicidal Lamp, 10W 4 Pin
Polaris Scientific

Polaris Scientific UV Ultraviolet Replacement Lamp, Germicidal Lamp, 10W 4 Pin

GL10PP
in stock

$18.99 - $18.99
$18.99
$18.99 - $18.99
$18.99

Polaris Scientific GL10PP Replacement Germicidal Lamp for the UVA-1C Ultraviolet UV System.

$18.99 - $18.99
$18.99
$18.99 - $18.99
$18.99
Hydro Guard HDG-012 Filter Wrench for HDGT-45 Twist Off and HDG-45 drop In RO Systems - IFilters
Hydro Guard

Hydro Guard HDG-012 Filter Wrench for HDGT-45 Twist Off and HDG-45 drop In RO Systems

HDG-012
in stock

$2.99 - $2.99
$2.99
$2.99 - $2.99
$2.99

Hydro Guard Filter Wrench – OEM Replacement for HDGT-45 & HDG-45 Systems Make filter replacements effortless with the Hydro Guard Filter Wrench...

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$2.99 - $2.99
$2.99
$2.99 - $2.99
$2.99
5 Stage Premium Reverse Osmosis Complete System 50 GPD, Brushed Nickel Faucet, 5 Gal Tank
iFilters

5 Stage Premium Reverse Osmosis Complete System 50 GPD, Chrome Faucet, 4 Gal Tank

RO-550-T4
in stock

$158.95 - $158.95
$158.95
$158.95 - $158.95
$158.95

Designed to filter 99% of contaminants and provide 50 GPD of safe clean water, iFilters has introduced the best RO system in the market at a great ...

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$158.95 - $158.95
$158.95
$158.95 - $158.95
$158.95
Auto Ship
Hydronix 4 Pack CB-45-1005 Whole House, Hydroponics Carbon Block Water Filters CTO 4.5" x 10" - 5 micron - IFilters
Hydronix 4 Pack CB-45-1005 Whole House, Hydroponics Carbon Block Water Filters CTO 4.5" x 10" - 5 micron - IFilters
Hydronix

Hydronix 4 Pack CB-45-1005 Whole House, Hydroponics Carbon Block Water Filters CTO 4.5" x 10" - 5 micron

CB-45-1005/4
in stock

$67.95 - $67.95
$67.95
$67.95 - $67.95
$67.95

4 Pack Hydronix CB-45-1005 Coconut Shell Carbon Block water filter cartridge measures 4.5" x 10" standard. This filters offers a 5 micron nominal f...

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$67.95 - $67.95
$67.95
$67.95 - $67.95
$67.95
Auto Ship
Reverse Osmosis Replacement Filter Set RO Cartridges 5 pcs, 100 GPD Membrane, QC - IFilters
Reverse Osmosis Replacement Filter Set RO Cartridges 5 pcs, 100 GPD Membrane, QC - IFilters
Smart Pack

Reverse Osmosis Replacement Filter Set RO Cartridges 5 pcs, 100 GPD Membrane, QC

RO-100KITQ
in stock

$49.99 - $49.99
$49.99
$49.99 - $49.99
$49.99

5 Stage NSF Reverse Osmosis RO Replacement Water Filter Set with 100 GPD Membrane. For any standard RO system. Sediment, UDF, CTO, Membrane & G...

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$49.99 - $49.99
$49.99
$49.99 - $49.99
$49.99
PRO+AQUA WS-P-16-BNDL - Portable RV Water Softener 16,000 Grains and Filtration System Bundle - IFilters
PRO+AQUA WS-P-16-BNDL – Portable RV Water Softener & Filtration System Bundle – 16,000 Grains
PRO+AQUA

PRO+AQUA WS-P-16-BNDL - Portable RV Water Softener 16,000 Grains and Filtration System Bundle

WS-P-16-BNDL
In stock

$329.94 - $329.94
$329.94
$329.94 - $329.94
$329.94

PRO+AQUA WS-P-16-BNDL – Portable RV Water Softener & Filtration System Bundle – 16,000 Grains Premium Portable Water Softener & Filtration ...

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$329.94 - $329.94
$329.94
$329.94 - $329.94
$329.94
Whole House Water Filtration System 2 Stage Bundle for Sediment & CTO, 3/4" Gen2 - IFilters
LWH-D Variations
iFilters

Whole House Water Filtration System 2 Stage Bundle for Sediment & CTO, 3/4" Gen2

LWH-D-BNDL
in stock

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

The iFilters LWH-D Gen2 Dual Stage Whole House Water Filter System (Light Whole House Series) has been updated with better filters and added flow f...

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$99.99 - $99.99
$99.99
$99.99 - $99.99
$99.99
Pro+Aqua Control Head Quick Connect Drain Elbow 1/2" for Softener Filtration System - IFilters
PRO+AQUA

Pro+Aqua Control Head Quick Connect Drain Elbow 1/2" for Softener Filtration System

P-56247
in stock

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

Pro+Aqua Control Valve Head Quick Connect Drain Elbow 1/2" for Softener and Filtration System

$19.99 - $19.99
$19.99
$19.99 - $19.99
$19.99
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
Pro+Aqua Electronic Turbine Flow Meter Kit Fits Fleck 2510 5600 SE/SXT Control Valves - IFilters
PRO+AQUA

Pro+Aqua Electronic Turbine Flow Meter Kit Fits Fleck 2510 5600 SE/SXT Control Valves

P-60626
in stock

$89.99 - $89.99
$89.99
$89.99 - $89.99
$89.99

Pro+Aqua Electronic Turbine Flow Meter Complete Kit Fits Fleck 2510, 5600, SE/SXT Water Softener/Filter Control Valves

$89.99 - $89.99
$89.99
$89.99 - $89.99
$89.99
Auto Ship
6 Pack, Hydronix SPC-45-1005 Pentek ECP5-BB 5 Micron Whole House Sediment Filter
6 Pack, Hydronix SPC-45-1005 Pentek ECP5-BB 5 Micron Whole House Sediment Filter
Hydronix

6 Pack, Hydronix SPC-45-1005 Pentek ECP5-BB 5 Micron Whole House Sediment Filter

SPC-45-1005/6
in stock

$69.16 - $69.16
$69.16
$69.16 - $69.16
$69.16

Hydronix SPC series 4.5" x 10" 5 micron polyester pleated cartridges are manufactured from durable polyester to provide you with a superior pleated...

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$69.16 - $69.16
$69.16
$69.16 - $69.16
$69.16
iFilters

Whole House Water Filtration System 2 Stage Sediment Chlorine Taste Odor VOCs 1" Ports

MWH-D
in stock

$159.99 - $159.99
$159.99
$159.99 - $159.99
$159.99

The iFilters MWH-D Dual stage 4.5" x 10" Whole House Water Filter System comes complete with a high capacity String-wound Polypropylene sediment fi...

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$159.99 - $159.99
$159.99
$159.99 - $159.99
$159.99
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