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!

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Hydro Guard

Hydro Guard HDGT-45 Reverse Osmosis 1-Year Filter Replacement Set, 50 GPD

HDGT-45-SET

in stock

$139.99 - $139.99

$139.99

$139.99 - $139.99

$139.99

Hydro Guard HDGT-45 Reverse Osmosis 1-Year Filter Replacement Set – 50 GPD The Hydro Guard HDGT-45 Reverse Osmosis 1-Year Filter Replacement Set is...

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$139.99 - $139.99

$139.99

$139.99 - $139.99

$139.99

Polaris Scientific

Polaris Scientific GL39PP UV Ultraviolet Replacement Lamp, Germicidal Lamp, 39W

GL39PP

in stock

$46.55 - $46.55

$46.55

$46.55 - $46.55

$46.55

Polaris Scientific GL39PP Replacement Germicidal Lamp for the UVA-12C, UVA-24B, UVA-36B, UVA-50B, UVA-60B, UVA-80B and UVA-100B Ultraviolet UV System.

$46.55 - $46.55

$46.55

$46.55 - $46.55

$46.55

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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Hydronix

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

ICF-2512-ALK

in stock

$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

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

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iFilters

RP-3500 Replacement Water Filter, 1000 Gal, Compatible with Frescapure 3500 WF0451

RP-3500

in stock

$59.95 - $59.95

$59.95

$59.95 - $59.95

$59.95

iFilters RP-3500 is a 100% compatible alternative replacement to the WF0451 filter used in the RP 3500 water filtration systems. Made from certifie...

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$59.95 - $59.95

$59.95

$59.95 - $59.95

$59.95

Auto Ship

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

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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

PRO+AQUA

PRO+AQUA WS-P-16 - Portable RV Water Softener Pro Grade 16,000 Grain, Trailers, Boats, Car Washing

WS-P-16

In stock

$279.95 - $279.95

$279.95

$279.95 - $279.95

$279.95

PRO+AQUA WS-P-16 Portable RV Water Softener – 16,000 Grain Premium Mobile Softening Solution for RVs, Boats, Car Washing & More The PRO+AQUA WS...

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$279.95 - $279.95

$279.95

$279.95 - $279.95

$279.95

iFilters

iFilters Dual-Stage Whole House Well Water Filtration System – Reduces Rust, Iron, Sediment, Sulfur Odors & Taste – 4.5″ × 20″ Housing, 1″ Ports

MWH-D20-WELL

in stock

$259.99 - $259.99

$259.99

$259.99 - $259.99

$259.99

Keep your home’s water clean, clear, and great-tasting with the iFilters Dual-Stage Whole House Well Water Filtration System. Specifically designed...

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$259.99 - $259.99

$259.99

$259.99 - $259.99

$259.99

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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

iFilters

Well Water Filtration Sediment System Pleated Washable Filter, Clear, 1" Ports

MWHSD-WELL

in stock

$119.99 - $119.99

$119.99

$119.99 - $119.99

$119.99

The iFilters MWHSD-WELL 10" Clear Heavy Duty Whole House Well Water Filter System comes complete with a high quality reusable/washable chemical res...

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$119.99 - $119.99

$119.99

$119.99 - $119.99

$119.99

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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

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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

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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

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

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

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

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Hydronix

Coconut Shell CTO, Carbon Block Water Filter Cartridge, 0.5 Micron 2.5 x 10

SMCB-2510

in stock

$14.00 - $14.00

$14.00

$14.00 - $14.00

$14.00

Hydronix SMCB-2510 carbon block filters are NSF/ANSI standard 42 certified for Material and structural Safety. SMCB-2520 filters have a particle re...

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$14.00 - $14.00

$14.00

$14.00 - $14.00

$14.00

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iFilters

Water Softener Resin Media High Quality Replacement Cation Ion Exchange 1/2 CuFt

MED-CAT-025/2

in stock

$74.99 - $74.99

$74.99

$74.99 - $74.99

$74.99

Half a Cubic Foot, perfect for portable water softeners needing resin media replacement. 100% compatible replacement for any water softener system ...

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$74.99 - $74.99

$74.99

$74.99 - $74.99

$74.99

Hydronix PMP-43622-01 Power Supply Transformer for PMP-300GPD Booster Pump

Aquatrol

Aquatrol PMP-300GPD 300 GPD RO Booster Pump for 300 GPD RO Systems

PMP-300GPD

in stock

$178.00 - $178.00

$178.00

$178.00 - $178.00

$178.00

Aquatrol PMP-300GPD – 300 GPD Reverse Osmosis Booster Pump High-Performance RO Booster Pump for 300 GPD Systems The Aquatrol PMP-300GPD is a heavy-...

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$178.00 - $178.00

$178.00

$178.00 - $178.00

$178.00