Skip to content

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

Auto Ship
iFilters

SW5-4510 Whole House Sediment String Wound Water Filter Cartridge, 5 micron 4.5" x 10"

SW5-4510
in stock

$11.99 - $11.99
$11.99
$11.99 - $11.99
$11.99

The SW5-4510 Polypropylene String Wound Filters has a particle retention Size of 5 micron and are used in a residential and commercial water filtra...

View full details
$11.99 - $11.99
$11.99
$11.99 - $11.99
$11.99
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...

View full details
$259.99 - $259.99
$259.99
$259.99 - $259.99
$259.99
Auto Ship
2 Pack RP-3500 Replacement Water Filter, Compatible with Frescapure 3500 WF0451 - IFilters
RP-3500 Variations
iFilters

2 Pack RP-3500 Replacement Water Filter, Compatible with Frescapure 3500 WF0451

RP-3500/2
in stock
$109.99 - $109.99
$109.99
$109.99 - $109.99
$109.99

2 Pack iFilters RP-3500 is a 100% compatible alternative replacement to the WF0451 filter used in the RP 5300 water filtration systems. Made from c...

View full details
$109.99 - $109.99
$109.99
$109.99 - $109.99
$109.99
PRO+AQUA PRO-100-E ELITE GEN2, Po features include: Pressure Release, Pro Guages, 1in Ports, Pro-grade Bracket, Clear Housing.
PRO+AQUA PRO-100-E ELITE GEN2 Whole House 3-Stage Well Water Filter System – 1” Ports with Gauges
PRO+AQUA

PRO+AQUA PRO-100-E ELITE GEN2 Whole House 3 Stage Well Water Filter System, Gauges, 1” Ports

PRO-100-E
in stock

$489.95 - $489.95
$489.95
$489.95 - $489.95
$489.95

PRO+AQUA PRO-100-E ELITE GEN2 Whole House 3-Stage Well Water Filter System – 1” Ports with Gauges Advanced Whole House Water Filtration for Unmatch...

View full details
$489.95 - $489.95
$489.95
$489.95 - $489.95
$489.95
Auto Ship
iFilters

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

MED-CAT-025/2
in stock

$79.99 - $79.99
$79.99
$79.99 - $79.99
$79.99

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

View full details
$79.99 - $79.99
$79.99
$79.99 - $79.99
$79.99
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...

View full details
$67.95 - $67.95
$67.95
$67.95 - $67.95
$67.95
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
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...

View full details
$6.99 - $6.99
$6.99
$6.99 - $6.99
$6.99
PRO+AQUA WS-P-16 - Portable RV Water Softener Pro Grade 16,000 Grain, Trailers, Boats, Car Washing - IFilters
PRO+AQUA WS-P-16 Portable RV Water Softener – 16,000 Grain
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...

View full details
$279.95 - $279.95
$279.95
$279.95 - $279.95
$279.95
Well Water Filtration Sediment System Pleated Washable Filter, Clear, 1" Ports - IFilters
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...

View full details
$119.99 - $119.99
$119.99
$119.99 - $119.99
$119.99
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...

View full details
$35.84 - $35.84
$35.84
$35.84 - $35.84
$35.84
Hydronix PMP-43622-01 Power Supply Transformer for PMP-300GPD Booster Pump
Aquatrol PMP-300GPD – 300 GPD Reverse Osmosis 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-...

View full details
$178.00 - $178.00
$178.00
$178.00 - $178.00
$178.00
Auto Ship
2 PK Whole House Reverse Osmosis Sediment Water Filter Cartridge 2.5 x 10, 5 μm
Hydronix

2 PK Whole House Reverse Osmosis Sediment Water Filter Cartridge 2.5 x 10, 5 μm

SDC-25-1005/2
in stock
$9.00 - $9.00
$9.00
$9.00 - $9.00
$9.00

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

View full details
$9.00 - $9.00
$9.00
$9.00 - $9.00
$9.00
Auto Ship
Coconut Shell CTO, Carbon Block Water Filter Cartridge, 0.5 Micron 2.5 x 10
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...

View full details
$14.00 - $14.00
$14.00
$14.00 - $14.00
$14.00
Auto Ship
TW-1812-50 50 GPD Reverse Osmosis DI RO Membrane Replacement Filter, Fits Standard Systems - IFilters
TW-1812-50 50 GPD Reverse Osmosis DI RO Membrane Replacement Filter, Fits Standard Systems - IFilters
Hydron

TW-1812-50 50 GPD Reverse Osmosis DI RO Membrane Replacement Filter, Fits Standard Systems

TW-1812-50
in stock
$18.00 - $18.00
$18.00
$18.00 - $18.00
$18.00

Hydron TW-1812-50 – 50 GPD Reverse Osmosis Membrane for DI & RO Systems The Hydronix TW-1812-50 is a high-performance 50 GPD Reverse Osmosis me...

View full details
$18.00 - $18.00
$18.00
$18.00 - $18.00
$18.00
Auto Ship
Reverse Osmosis Replacement Filter Set RO Cartridges 5 pcs, 50 GPD Membrane, QC - IFilters
Reverse Osmosis Replacement Filter Set RO Cartridges 5 pcs, 50 GPD Membrane, QC - IFilters
Smart Pack

Reverse Osmosis Replacement Filter Set RO Cartridges 5 pcs, 50 GPD Membrane, QC

RO-50KITQ
in stock
$38.00 - $38.00
$38.00
$38.00 - $38.00
$38.00

5 Stage NSF Reverse Osmosis RO Replacement Water Filter Set with 50 GPD Membrane. For any standard 5 Stage RO system. Sediment, GAC, CTO Carbon Blo...

View full details
$38.00 - $38.00
$38.00
$38.00 - $38.00
$38.00
Auto Ship
Pleated Sediment Water Filter Home or Commercial, Reusable 4.5" x 20" - 5 μm - IFilters
Hydronix

Pleated Sediment Water Filter Home or Commercial, Reusable 4.5" x 20" - 5 μm

SPC-45-2005
in stock
$24.90 - $24.90
$24.90
$24.90 - $24.90
$24.90

The Hydronix SPC-45-2005 4.5" x 20" 5 micron polyester pleated cartridges are manufactured from durable polyester to provide you with a superior pl...

View full details
$24.90 - $24.90
$24.90
$24.90 - $24.90
$24.90
Auto Ship
Whole House Coconut Shell Carbon GAC Water Filter 4.5 x 20 - IFilters
Hydronix

Whole House Coconut Shell Carbon GAC Water Filter 4.5 x 20

UDF-20BP
in stock

$30.95 - $30.95
$30.95
$30.95 - $30.95
$30.95

The Hydronix UDF-20BP granular activated carbon (GAC) cartridges are the best choice for your higher flow, taste, odder and chlorine reduction need...

View full details
$30.95 - $30.95
$30.95
$30.95 - $30.95
$30.95
Auto Ship
4 Pk Carbon Block Water Filter CTO Whole House RO DI Hydroponics 5 μm 10" x 2.5" - IFilters
4 Pk Carbon Block Water Filter CTO Whole House RO DI Hydroponics 5 μm 10" x 2.5" - IFilters
Hydronix

4 Pk Carbon Block Water Filter CTO Whole House RO DI Hydroponics 5 μm 10" x 2.5"

CB-25-1005/4
in stock
$34.99 - $34.99
$34.99
$34.99 - $34.99
$34.99

4 Pack - Hydronix Carbon Block Filters are manufactured with high purity coconut shell carbon. These Coconut Carbon Block filters provide an excell...

View full details
$34.99 - $34.99
$34.99
$34.99 - $34.99
$34.99
Stainless Steel Garden Hose Fitting Adapters 3/4" Male NPT to 3/4" GHT Set - IFilters
PRO+AQUA

Stainless Steel Garden Hose Fitting Adapters 3/4" Male NPT to 3/4" GHT Set

GHT-NPT-SET
in stock
$13.95 - $13.95
$13.95
$13.95 - $13.95
$13.95

Convert any 3/4" female NPT port to Garden Hose Male and Female Thread. This set is used to convert any Whole House Water Filtration System with st...

View full details
$13.95 - $13.95
$13.95
$13.95 - $13.95
$13.95
Auto Ship
Cover image
Sediment Water Filter for Whole House, RO Systems, Hydroponics, 2.5" x 20" 5 μm - IFilters
Hydronix

Sediment Water Filter for Whole House, RO Systems, Hydroponics, 2.5" x 20" 5 μm

SDC-25-2005
in stock
$7.50 - $7.50
$7.50
$7.50 - $7.50
$7.50

Hydronix SDC-25-2005 polypropylene sediment filters have a particle retention Size of 5 micron and is used in a residential and commercial water fi...

View full details
$7.50 - $7.50
$7.50
$7.50 - $7.50
$7.50
Auto Ship
(20 Pack) Hydronix SGC-25-1005 - 5 Micron Sediment Filters Replaces Aqua-Pure AP110 WHCF-GD05 FPMBG-5-975
(20 Pack) Hydronix SGC-25-1005 - 5 Micron Sediment Filters Replaces Aqua-Pure AP110 WHCF-GD05 FPMBG-5-975
Hydronix

(20 Pack) Hydronix SGC-25-1005 - 5 Micron Sediment Filters Replaces Aqua-Pure AP110 WHCF-GD05 FPMBG-5-975

SGC-25-1005/20
in stock

$60.00 - $60.00
$60.00
$60.00 - $60.00
$60.00

Grooved Melt Blown Polypropylene Filter Features and Benefits Gradient Density, Multi-Layered, Melt Blown Sediment Filter Cartridge. Larger particl...

View full details
$60.00 - $60.00
$60.00
$60.00 - $60.00
$60.00
Auto Ship
cover image
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...

View full details
$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00
Aquatrol BT-1633-KIT Water Softener Brine Tank with Safety Float – 16" x 33", Black
Aquatrol

Aquatrol BT-1633-KIT Water Softener Salt brine Tank With Safety Float, Black 16x33

BT-1633-KIT
in stock

$129.95 - $129.95
$129.95
$129.95 - $129.95
$129.95

Aquatrol BT-1633-KIT Water Softener Brine Tank with Safety Float – 16" x 33", Black The Aquatrol BT-1633-KIT Universal Brine Tank is a high-quality...

View full details
$129.95 - $129.95
$129.95
$129.95 - $129.95
$129.95
Autoship Popup
{"statementLink":"","footerHtml":"","hideMobile":false,"hideTrigger":false,"disableBgProcess":false,"language":"en","position":"right","leadColor":"#146ff8","triggerColor":"#146ff8","triggerRadius":"50%","triggerPositionX":"right","triggerPositionY":"bottom","triggerIcon":"people","triggerSize":"medium","triggerOffsetX":95,"triggerOffsetY":20,"mobile":{"triggerSize":"small","triggerPositionX":"right","triggerPositionY":"bottom","triggerOffsetX":90,"triggerOffsetY":10,"triggerRadius":"50%"}}