Under-Sink Water Filters Systems

Looking for under-sink filtration systems for your home? Here, you will find reverse osmosis (RO) water filter systems, including tankless RO and traditional 6-stage tank RO systems, both equipped with remineralization media. 3M Aqua-Pure Non-RO under sink water filter replacements and inline undersink filter systems offer additional ways to filter and polish the water coming out of your kitchen faucet. And if you have high-volume water filtration needs for commercial-scale coffee, tea, ice making, and cold beverage production or service, All Filters offers a wide selection of 3M commercial inline filters and reserve osmosis systems at attractive prices. See our Under-Sink Water Filter Replacement Cartridges page for replacement SpiroPure, 3M, and GE under-sink water filter cartridges and SpiroPure RO membranes. There are also under-sink water filter replacements for 3M AquaPure filter systems and inline filters, as well as under-sink water filter replacement cartridge lines by 3M Aqua-Pure.

SpiroPure RO3
  • 5 Stars
  • (1)

SpiroPure 1000 GPD Tankless RO System with Remineralization SP-RO1000TL

List Price: $587.86

Our Price: $332.77

Save: $255.09!
VIEW DETAILS
Replace filters every 12 months

Tankless RO requires less space, and supplies more filtered RO water instantly. Easier installation and maintenance.

SpiroPure RO3-RS

SpiroPure One-Year Filter Replacement Set for Tankless Remineralization RO System SP-RO1000TL

List Price: $225.86

Our Price: $105.30

Save: $120.56!
VIEW DETAILS
Replace every 12 months

The SCB (sediment, carbon, MineralPlus remineralization alkaline) cartridge and 1000 GPD RO membrane cartridge set

SP-RO100MP Remineralization

SpiroPure SP-RO100MP RO Filter System Under Sink 6-Stage with Remineralization

List Price: $286.12

Our Price: $143.06

Save: $143.06!
VIEW DETAILS
No Faucet / Unbranded

6-stage under sink RO filter system with remineralization adds back lost beneficial minerals for better taste and pH

SpiroPure SP-RO100-BK

SpiroPure SP-RO100MP-BK 6-Stage Reverse Osmosis Filtration System with Faucet

List Price: $380.96

Our Price: $190.48

Save: $190.48!
VIEW DETAILS
Matte Black Air Gap Faucet

6-Stage RO system with remineralization for purer drinking water and ice, cooking and food prep, humidifiers, and more

SpiroPure SP-RO100-GD
  • 5 Stars
  • (1)

SpiroPure SP-RO100MP-GD 6-Stage Reverse Osmosis Filtration System with Faucet

List Price: $420.92

Our Price: $210.46

Save: $210.46!
VIEW DETAILS
Gold Air Gap Faucet

6-Stage RO system with remineralization great for purer drinking water and ice, cooking and food prep, humidifiers, and more

SpiroPure SP-RO100-NK

SpiroPure SP-RO100MP-NK 6-Stage Reverse Osmosis Filtration System with Faucet

List Price: $376.92

Our Price: $188.46

Save: $188.46!
VIEW DETAILS
Nickel Air Gap Faucet

6-Stage RO system with remineralization for purer drinking water and ice, cooking and food prep, humidifiers, and more

SpiroPure SP-RO100-CM

SpiroPure SP-RO100MP-CM 6-Stage Reverse Osmosis Filtration System with Faucet

List Price: $364.20

Our Price: $182.10

Save: $182.10!
VIEW DETAILS
Chrome Air Gap Faucet

6-Stage RO system with remineralization for purer drinking water and ice, cooking and food prep, humidifiers, and more

SP-RO125MP Remineralization

SpiroPure SP-RO125MP RO Filter Replacement Set 12 Month 6-Stage with Remineralization

List Price: $123.02

Our Price: $61.51

Save: $61.51!
VIEW DETAILS
Replace every 12 months

12 month replacement filter set for SP-RO100MP includes 6-stages of RO filtration including MineralPlus remineralization

Aqua-Pure 3MRO301 NSF Certified

3M Aqua-Pure 3MRO301 Reverse Osmosis Drinking Water Filtration System

List Price: $885.77

Our Price: $629.65

Save: $256.12!
VIEW DETAILS
Replace filter every 12 months
3M 3MRO401 NSF Certified

3M Aqua-Pure 3MRO401 Reverse Osmosis Drinking Water Filtration System

List Price: $1,012.96

Our Price: $720.05

Save: $292.91!
VIEW DETAILS
Replace filter every 12 months
Aqua-Pure 3MRO501 NSF Certified

3M Aqua-Pure 3MRO501 Pro Reverse Osmosis Drinking Water Filter System

List Price: $2,333.09

Our Price: $1,658.46

Save: $674.63!
VIEW DETAILS
Replace filter every 12 months
3M FSTM075 NSF Independently Certified

3M FSTM-HP / FSTM075 (without Permeate Pump) Reverse Osmosis System

List Price: $868.34

Our Price: $559.34

Save: $309.00!
VIEW DETAILS
Replace filter every 12 months
3MDW301 NSF Certified

3M Aqua-Pure 3MDW301 Advanced Under-Sink Water Filter

List Price: $661.20

Our Price: $250.49

Save: $410.71!
VIEW DETAILS
Replace filter every 12 months
3MFF100 NSF Certified

3M Aqua-Pure 3MFF100 Inline Full Flow Undersink Water Filter

List Price: $561.10

Our Price: $280.55

Save: $280.55!
VIEW DETAILS
Replace filter every 12 months

Installed to your existing kitchen faucet

aquapure CS-FF NSF Certified

Aqua-Pure CS-FF/Cyst-FF Inline Full Flow Drinking Water Filter

List Price: $230.53

Our Price: $163.88

Save: $66.65!
VIEW DETAILS
Replace filter every 6-12 months

Installed to your existing kitchen faucet

3M AP200 NSF Certified

3M Aqua-Pure AP200 Full Flow UnderSink Water Filter

List Price: $315.90

Our Price: $157.95

Save: $157.95!
VIEW DETAILS
Replace filter every 6 months
Aqua-Pure FM DWS 1500

3M Water Factory Systems FaucetMATE FM DWS 1500 Drinking Water System

List Price: $359.94

Our Price: $179.97

Save: $179.97!
VIEW DETAILS
Replace filter every 12 months
Aquapure Complete Cooler

3M Aqua-Pure AP Easy Complete Under-Sink Filter Complete Cooler

List Price: $214.30

Our Price: $143.59

Save: $70.71!
VIEW DETAILS
Replace filter every 6-12 months
aquapure AP-DWS1000LF

Aqua-Pure AP-DWS1000LF Undersink Water Filter (No Faucet)

List Price: $613.03

Our Price: $423.07

Save: $189.96!
VIEW DETAILS
Replace filter every 6-12 months

Rated #1 by a leading consumer magazine!

aquapure CS-FF NSF Certified

Aqua-Pure CS-FF/Cyst-FF Inline Full Flow Drinking Water Filter

List Price: $230.53

Our Price: $163.88

Save: $66.65!
VIEW DETAILS
Replace filter every 6-12 months

Installed to your existing kitchen faucet

3M BEV130 NSF Certified

3M Cuno BEV130 Single Cartridge Cold Beverage Water Filtration System

List Price: $446.70

Our Price: $223.35

Save: $223.35!
VIEW DETAILS
Replace filter every 12 months
3M BREW120-MS NSF Certified

3M BREW120-MS Commercial Coffee and Hot Tea Water Filter System

List Price: $311.08

Our Price: $155.54

Save: $155.54!
VIEW DETAILS
Replace filter every 12 months
3M ESP124-T NSF Certified

3M Cuno ESP124-T Espresso Water Filtration System

List Price: $295.86

Our Price: $147.93

Save: $147.93!
VIEW DETAILS
Replace filter every 12 months
3M ICE120-S NSF Certified

3M ICE120-S Commercial Ice Machine Water Filter System

List Price: $424.36

Our Price: $212.18

Save: $212.18!
VIEW DETAILS
Replace filter every 12 months
3M ICE140-S NSF Certified

3M ICE140-S Commercial Ice Machine Water Filter System

List Price: $563.14

Our Price: $281.57

Save: $281.57!
VIEW DETAILS
Replace filter every 12 months
3M ICE160-S NSF Certified

3M ICE160-S Commercial Ice Machine Water Filtration System

List Price: $506.82

Our Price: $325.82

Save: $181.00!
VIEW DETAILS
Replace filter every 12 months
3M ICE190-S NSF Certified

3M ICE190-S Commercial Ice Machine Water Filter System

List Price: $822.48

Our Price: $411.24

Save: $411.24!
VIEW DETAILS
Replace filter every 12 months
3M SF165 NSF Independently Certified

3M Cuno SF165 ScaleGARD HT Water Filtration System

List Price: $1,035.03

Our Price: $665.42

Save: $369.61!
VIEW DETAILS
Replace filters every 12 months
3M BREW125-MS NSF Certified

3M BREW125-MS Commercial Coffee & Hot Tea Water Filtration System

List Price: $308.02

Our Price: $154.01

Save: $154.01!
VIEW DETAILS
Replace filter every 12 months
3M DP190 NSF Certified

3M DP190 Dual Port Water Filtration System

List Price: $1,242.70

Our Price: $798.92

Save: $443.78!
VIEW DETAILS
Replace filter every 12 months
3M BEV160 NSF Certified

3M BEV160 Commercial Cold Beverage Water Filtration System

List Price: $494.64

Our Price: $314.97

Save: $179.67!
VIEW DETAILS
Replace filter every 12 months
3M BEV190 NSF Certified

3M Commercial Cold Beverage Dispenser Water Filtration System

List Price: $627.57

Our Price: $407.30

Save: $220.27!
VIEW DETAILS
Replace filter every 12 months
3M DP260 NSF Certified

3M DP260 Commercial Dual-Port Water Filtration System

List Price: $1,618.47

Our Price: $1,040.51

Save: $577.96!
VIEW DETAILS
Replace filters every 12 months
3M DP290 NSF Certified

3M DP290 Dual-Port Commercial Water Filtration System

List Price: $1,857.21

Our Price: $1,193.99

Save: $663.22!
VIEW DETAILS
Replace filters every 12 months
3M DP390 NSF Certified

3M DP390 Dual-Port Commercial Water Filtration System

List Price: $2,492.63

Our Price: $1,602.50

Save: $890.13!
VIEW DETAILS
Replace filters every 12 months
3M ICE125-S NSF Certified

3M ICE125-S Commercial Ice Machine Water Filtration System

List Price: $421.36

Our Price: $210.68

Save: $210.68!
VIEW DETAILS
Replace filter every 12 months
3M ICE260-S

3M ICE260-S Commercial Ice Machine Water Filtration System

List Price: $1,392.20

Our Price: $895.04

Save: $497.16!
VIEW DETAILS
Replace filters every 12 months
3M CFS717 NSF Certified

3M CFS717 Commercial In-Line Water Filtration System

List Price: $78.76

Our Price: $39.38

Save: $39.38!
VIEW DETAILS
Replace every 6 months
3M CFS8576-S NSF Certified

3M CFS8576-S (Series 7000-S) Commercial Water Filtration System

List Price: $250.60

Our Price: $134.00

Save: $116.60!
VIEW DETAILS
Replace every 12 months
3M CFS201BWF

3M CFS201BWF Automatic Backwashing Point-of-Entry Water Filter System

List Price: $2,259.17

Our Price: $1,452.41

Save: $806.76!
VIEW DETAILS
3M SF18-S NSF Independently Certified

3M SF18-S Scale Inhibition Water Filtration System

List Price: $206.60

Our Price: $103.30

Save: $103.30!
VIEW DETAILS
Replace filter every 6 months
3M SGLP-075 NSF Independently Certified

3M SGLP-075 (with Permeate Pump) Reverse Osmosis Water Filtration System

List Price: $1,137.14

Our Price: $731.05

Save: $406.09!
VIEW DETAILS
Replace filter every 12 months
3M SGLP200-CL

3M SGLP200-CL Reverse Osmosis Filtration System

List Price: $2,200.00

Our Price: $1,481.72

Save: $718.28!
VIEW DETAILS
Replace filters every 6-12 months
3M SGLP200-CL-BP

3M SGLP200-CL-BP Reverse Osmosis Filtration System with Bypass

List Price: $2,736.34

Our Price: $1,759.19

Save: $977.15!
VIEW DETAILS
Replace filters every 6-12 months
3M BREW130-MS NSF Certified

3M BREW130-MS Commercial Coffee and Hot Tea Water Filter System

List Price: $339.94

Our Price: $169.97

Save: $169.97!
VIEW DETAILS
Replace filter every 6-12 months
3M BEV140 NSF Certified

3M BEV140 Commercial Cold Beverage Dispenser Water Filter System

List Price: $557.28

Our Price: $278.64

Save: $278.64!
VIEW DETAILS
Replace filter every 6-12 months
3M BEV145 NSF Certified

3M BEV145 Commercial Cold Beverage High Flow Series Water Filter System

List Price: $543.86

Our Price: $271.93

Save: $271.93!
VIEW DETAILS
Replace filter every 6-12 months
3M ICE145-S NSF Certified

3M ICE145-S Commercial Ice Machine High Flow Series Water Filter System

List Price: $550.70

Our Price: $275.35

Save: $275.35!
VIEW DETAILS
Replace filter every 6-12 months
3M BEV165 NSF Certified

3M BEV165 Commercial Cold Beverage High Flow Series Water Filter System

List Price: $482.02

Our Price: $308.03

Save: $173.99!
VIEW DETAILS
Replace filter every 6-12 months
3M ICE165-S NSF Certified

3M ICE165-S Commercial Ice Machine High Flow Series Water Filter System

List Price: $494.20

Our Price: $317.73

Save: $176.47!
VIEW DETAILS
Replace filter every 6-12 months
3M BEV195 NSF Certified

3M BEV195 Commercial Cold Beverage Dispenser Water Filtration System

List Price: $606.56

Our Price: $405.11

Save: $201.45!
VIEW DETAILS
Replace filter every 6-12 months
3M ICE195-S NSF Certified

3M ICE195-S Commercial Ice Machine Water Filter System

List Price: $618.68

Our Price: $397.74

Save: $220.94!
VIEW DETAILS
Replace filter every 6-12 months
3M ICE265-S NSF Certified

3M ICE265-S Commercial Ice Machine High Flow Series Water Filter System

List Price: $1,367.67

Our Price: $879.27

Save: $488.40!
VIEW DETAILS
Replace filter every 6-12 months
3M DWS160-L

3M DWS160-L Single Cartridge Drinking Water Filtration System

List Price: $457.60

Our Price: $281.58

Save: $176.02!
VIEW DETAILS
Replace every 6-12 months
3M SGP165BN-T

3M SGP165BN-T ScaleGard Pro Espresso Single Cartridge Filter System

List Price: $427.21

Our Price: $266.69

Save: $160.52!
VIEW DETAILS
Replace filter every 6-12 months
3M SGP195BN-T

3M SGP195BN-T ScaleGard Pro Espresso Single Cartridge Filter System

List Price: $479.89

Our Price: $299.58

Save: $180.31!
VIEW DETAILS
Replace filter every 6-12 months
3M SGP124BN-T

3M SGP124BN-T ScaleGard Pro Hardness Reduction Water Filter Systems

List Price: $410.18

Our Price: $205.09

Save: $205.09!
VIEW DETAILS
Replace filter every 6-12 months
3M BREW110-MS

3M BREW110-MS Commercial Coffee and Hot Tea Water Filter System

List Price: $279.54

Our Price: $139.77

Save: $139.77!
VIEW DETAILS
Replace filter every 12 months
3M BREW115-MS

3M BREW115-MS Commercial Coffee and Hot Tea Water Filter System

List Price: $269.18

Our Price: $134.59

Save: $134.59!
VIEW DETAILS
Replace filter every 12 months
3M CS-451

3M CS-451 OCS System for Office Coffee Applications w/ Rogo Filter Head

List Price: $132.70

Our Price: $70.97

Save: $61.73!
VIEW DETAILS
Replace filter every 6 months
3M OWS120-L

3M OWS120-L OCS Water System for Espresso Machines & Tea Brewers

List Price: $254.98

Our Price: $127.49

Save: $127.49!
VIEW DETAILS
Replace filter every 6 months
3M VH3CC350

3M VH3/CC350 OCS System for Office Water Applications

List Price: $237.84

Our Price: $118.92

Save: $118.92!
VIEW DETAILS
Replace filter every 6 months
3M VH3HC351-S

3M VH3/HC351-S OCS System for Office Coffee Applications

List Price: $227.76

Our Price: $113.88

Save: $113.88!
VIEW DETAILS
Replace filter every 6 months
3M OC205-S

3M OC205-S OCS In-line System for Office Coffee Applications

List Price: $42.52

Our Price: $21.26

Save: $21.26!
VIEW DETAILS
Replace every 6 months

Key Features to Consider in Under Sink Filter Systems

Choosing the best under-sink water filter system means evaluating several important factors. First, consider filtration capacity based on your household size. Traditional tank systems typically produce 50–100 gallons per day, while tankless models use booster pumps for continuous flow and can exceed 1,000 GPD. 3M Commercial systems ensure continuous flow for high-volume water filtration. Once installed, maintenance is minimal, mostly filter changes after 6 months to a year, depending on usage. Installation requirements vary: most systems need a dedicated faucet and drain connection, though inline filters connect to existing faucets for simpler setup. Space constraints under your sink may favor compact tankless designs over traditional tank systems. Finally, consider whether you need basic sediment and carbon filtration or comprehensive contaminant removal through under sink reverse osmosis technology.

Wide Selection of Under Sink Water Filtration Solutions

All Filters offers a wide selection of high-performance RO and under-sink water filters from leading brands like 3M AquaPure and SpiroPure. Our tankless SpiroPure RO systems offer a compact solution for instant, high-flow filtered water with remineralization. Remineralization reintroduces essential minerals into the water after it has undergone the RO filtration process.

Our traditional tank RO systems provide reliable 6-stage filtration with remineralization, featuring various faucet options available in different styles and finishes. We also offer inline under-sink filtration systems that provide convenient, full-flow filtration, connecting directly to your existing faucet with easy installation. Other under-sink water filter systems include 3M inline and reverse osmosis systems in their Aqua-Pure and other lines for inline and under-sink water filtration in ice making and beverage production.

Order Under-Sink Filter Systems Online

Enhance the quality of the water in your home with high-performance under-sink water filter systems from All Filters. Take advantage of our Super Value deals, which provide significant cost savings on bulk purchases, and enjoy free shipping on orders over $99. Our dedicated customer support team provides reliable 7-day support to ensure your questions are answered promptly, and any issues are resolved quickly. Order under-sink water filter systems online and enjoy high-quality filtration products at cost-effective prices.

FAQs on Under-Sink Water Filter Systems

What contaminants can an undersink water filter system remove?

Basic carbon filters reduce chlorine, sediment, bad taste, and odor issues. Under-sink reverse osmosis systems remove 95–99% of dissolved solids and impurities such as lead, arsenic, fluoride, PFAS, and nitrates. Multi-stage RO systems with remineralization (such as All Filters' MineralPlus media) provide the most comprehensive treatment while restoring beneficial minerals for improved taste and health benefits.
The best under-sink water filter system combine high-capacity or multi-stage filtration with practical features like easy installation and basic maintenance. Top systems include sediment prefilters, carbon blocks, RO membranes, and remineralization stages. Look for filter replacement indicators, leak detection, and flow rate to match your needs.
Under-sink reverse osmosis provides significantly more thorough filtration than standard filters. While basic carbon filters improve taste and sediment cartridges remove particles, RO membranes block contaminants down to 0.0001 microns, effectively removing 95–99% of dissolved solids as well as significantly reducing heavy metals, and chemicals. Modern tankless designs deliver bottled-water quality continuously and with less waste.
Most under-sink filtration systems are DIY projects that can be completed in 1 to 4 hours with basic tools. Plan more time or hire help for installations that require specialized drilling for a dedicated faucet and connecting drain lines. Inline filters offer simpler installation to existing faucets. Professional installation may also be needed to ensure code compliance and proper setup.
Sediment and carbon prefilters typically need replacement every 6–12 months. RO membranes can last 2–3 years, though annual replacement optimizes performance. Remineralization filters align with annual schedules but media may become depleted sooner. Most manufacturers offer email reminders or subscription programs to simplify maintenance tracking.