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BEST SELLERS

4th of July Sale
Reverse Osmosis Water Filter NU Aqua Efficiency Series Tankless 600GPD Reverse Osmosis System 2:1 Pure To Waste - front of system next to smart faucet

NU Aqua Efficiency Series Tankless 800GPD Reverse Osmosis System 2:1 Pure To Waste

starting from $415.95
4th of July Sale
Reverse Osmosis Water Filter System NU Aqua Countertop Main

NU Aqua 4-Stage Countertop Reverse Osmosis System with Hot Water

starting from $359.95
4th of July Sale
NU Aqua RO System 5 Stage Side

NU Aqua Platinum Series 5 Stage 100GPD RO System

starting from $159.95
4th of July Sale
NU Aqua RO System 6 Stage Alkaline Side

NU Aqua Platinum Series 6 Stage Alkaline 100GPD RO System

starting from $183.95
4th of July Sale
NU Aqua RO System 6 Stage UV Side

NU Aqua Platinum Series 6 Stage UV Ultraviolet 100GPD RO System

starting from $204.95
4th of July Sale
NU Aqua RO System 7 Stage Side

NU Aqua Platinum Series 7 Stage Alkaline and UV Ultraviolet 100GPD RO System

starting from $239.95
4th of July Sale
NU Aqua RO System 5 Stage With Pump Side

NU Aqua Platinum Series 5 Stage 100GPD RO System with Booster Pump

starting from $247.95
4th of July Sale
NU Aqua RO System 6 Stage With Pump Alkaline Side

NU Aqua Platinum Series 6 Stage Alkaline 100GPD RO System with Booster Pump

starting from $263.95
4th of July Sale
NU Aqua RO System 6 Stage UV With Pump Side

NU Aqua Platinum Series 6 Stage UV Ultraviolet 100GPD RO System with Booster Pump

starting from $293.95
4th of July Sale
NU Aqua RO System 7 Stage With Pump Side

NU Aqua Platinum Series 7 Stage Alkaline and UV Ultraviolet 100GPD RO System with Booster Pump

starting from $311.95
4th of July Sale
Reverse Osmosis Systems Nu Aqua alkaline Tankless 800GPD Main

NU Aqua Efficiency Series Tankless 800GPD Alkaline Remineralization Reverse Osmosis System 2:1 Pure To Waste

starting from $492.95
4th of July Sale
NU Aqua Efficiency Series Tankless 800GPD UV Sterilization Reverse Osmosis System 2:1 Pure To Waste

NU Aqua Efficiency Series Tankless 800GPD UV Sterilization Reverse Osmosis System 2:1 Pure To Waste

starting from $551.95
4.9
Based on 2354 reviews

Absolutely love it. My water is crystal clear and taste so good. You can definitely tell water no chemicals like chlorine... HIGHLY RECOMMEND

Gary Smith
9 out of 10

NU Aqua customer's would recommend us to their friends and family.

90% of customers

Said their NU Aqua filter drastically improved their drinking water quality and taste.

9 out of 10

Customer's have found that they're saving $40+ every month since they've installed their system.

*Based on a randomized survey of NU Aqua System product owners conducted in March 2025.

Featured On

Our systems

Reverse Osmosis Filtration
Filtration Stages
Alkaline Remineralization
UV Sterilizer
Connects to: Fridge / Ice maker
Sediment Filtration
Carbon Filtration
Rejection Rate
Booster Pump
Installation Difficulty
Installation Time
Installation Location
Water Temperature
Pure To Waste Ratio
Minimum Water Inlet Pressure
Power Required
Capacity
Other Features
Price
Household Size
See more features +
See less -
NU Aqua RO System 5 Stage Side

NU Aqua Platinum Series 5 Stage 100GPD RO System

5 -7
Optional
Optional
Optional
up to 99%
moderate
1 - 2 hours
undersink
ambient
1:3
45PSI
no
100 gal / day
$
4-5
Starting from $159.95

NU Aqua Platinum 5 Stage 100GPD RO System With Booster Pump

5 -7
Optional
Optional
Optional
up to 99%
moderate
1 - 2 hours
undersink
ambient
1:2
15PSI
yes
100 gal / day
$$
4-5
Starting from $239.95

NU Aqua Efficiency Series Tankless 800GPD Reverse Osmosis System

4 - 6
Optional
Optional
Optional
up to 99%
easy
1 hour
undersink
ambient
2:1
14.5PSI
yes
800 gal / day
Filter replacement reminder, 
Smart faucet
$$$
5+
Starting from $415.95

NU Aqua 4-Stage Countertop Reverse Osmosis System

4
up to 99%
easy
10 minutes
countertop
hot or ambient
5:1
N/A
yes
75 gal / day
Filter replacement reminder, 
Smart faucet
$$$
4-5
Starting from $359.95

NUAqua Platinum Series 100 GPD - RO Systems

3
n/a
Professional Recommended
2-3 hours
Main water line
Ambient
n/a
45PSI
15 gallons per minute
Pressure gauges
Starting from $359.95
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Learn about the Filter Club
Ultra Efficient

With systems up to a 2:1 pure to waste ratio, we're happy to say we have one of the most efficient RO systems available.

Low Cost Replacements

We provide the most affordable replacement filters to keep your systems costs cheaper than bottled water.

Premium Grade Components

High quality components ensure a long lasting leak-free experience.

No Worries, Guaranteed!

We're proud to offer the only guarantee in the industry with our FILTER it & LOVE it guarantee! We guarantee that our systems will transform your water into the cleanest, freshest, and most thirst-quenching water you've ever tasted. Try it for a full 120 days, if you don't absolutely love your NU Aqua Water Filter System, send your system back for a 100% full refund!

Learn More

We Make Filter Shopping Simple

Clean great tasting water - all at an unbeatable price
Guarantee
Warranty
Price
Replacement Filter Cost
Free Shipping
Free TDS Meter
Free Leak Detector
NU Aqua
120 Day Trial
3 year
$179.95
$65.95
Culligan
none
1 year
$1,495.95
$285
APEC
none
1 year
$229.95
$99.00
Ispring
none
1 year
$199.99
$78.09

*Price reflects the current subtotal of NU Aqua's 5 Stage reverse osmosis system. Additional shipping fees may apply in AK and HI. Price may not reflect any current promotions or discounts. Last Updated: July 2024.

Need Help Selecting The Perfect Filter System?

GIVE US A CALL

Want to speak to us directly? We'd love to chat with you!

Just call us at 1(888)-621-0460.

CHAT WITH US

If you have any questions about NU Aqua filtration systems - We are here to help! Click the blue chat icon on the bottom right corner of the screen.

EMAIL US

Have questions? We have answers!

Click here to shoot us an email.

About NU Aqua Systems

NU Aqua Systems was established with one simple mission:  to provide the highest quality home and commercial filtration.

Products, with expert customer service, delivered quickly, at the lowest prices possible. We are able to offer the best possible price because we are a factory direct and large volume, retailer. We purchase in huge quantities and pass the savings onto you. Don't be fooled by other companies that offer low-quality products at reduced rates, we screen and audit all of our factory partners to ensure that our customers receive only the highest grade, test proven filtration products, anywhere. If you find a lower advertised price on any of our products, let us know and we'll do our best to match it, beat it or send you a free gift!