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Bestseller 15% OFF
NU Aqua Platinum 100GPD RO System

Most Affordable

Alkaline & UV Filters available

Pump option available
Bestseller 15% OFF
Countertop Reverse Osmosis Systems

Dispenses Hot & Ambient

Zero Installation

Digital Display with Filter Reminders
15% OFF
Tankless Reverse Osmosis System

High efficiency

Alkaline & UV Filters available

Filter Replacement Reminders
15% OFF
Reef Series 4 Stage 100 GPD RODI - RO System

Consistent 0 TDS

Includes Faucet & Hose Adapter

Premium Deionization Media
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Reverse Osmosis Systems
Bestseller 15% OFF
NU Aqua Platinum 100GPD RO System

Most Affordable

Alkaline & UV Filters available

Pump option available
Bestseller 15% OFF
Countertop Reverse Osmosis Systems

Dispenses Hot & Ambient

Zero Installation

Digital Display with Filter Reminders
15% OFF
Tankless Reverse Osmosis System

High efficiency

Alkaline & UV Filters available

Filter Replacement Reminders
15% OFF
Reef Series 4 Stage 100 GPD RODI - RO System

Consistent 0 TDS

Includes Faucet & Hose Adapter

Premium Deionization Media
Shop All Systems
Not sure which fits you best?
Take our quiz 30-second quiz and find your system.
Take Quiz
Water Filters

Under Sink

Countertop Filters

Shower Filters

Inline Refrigerator Filters

Shop All Systems
Whole House Systems
Filter Club
Replacement Filters
Parts & Accessories

Faucets
Wide choice of faucets to fit your home best.

Fittings
Wide choice of faucets to fit your home best.

Brackets
Wide choice of faucets to fit your home best.

Filter Housing
Wide choice of faucets to fit your home best.

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Christmas Sale

Reverse Osmosis Water Filter System NU Aqua Countertop RO Replacement Filters Bundle

2 reviews

NU Aqua Replacement Filters for the Countertop Reverse Osmosis System

Sale priceFrom $35.96 Regular price$39.95

Choose options

Christmas Sale

Reverse Osmosis Replacement Water Filters NU Aqua Replacement UV Bulb - close up

5 reviews

NU Aqua Replacement UV Bulb

Sale price$32.36 Regular price$35.95

Christmas Sale

3 reviews

NU Aqua Reverse Osmosis Storage Tank Ball Valve

Sale price$9.86 Regular price$10.95

Christmas Sale

NU Aqua Reverse Osmosis Water Filtration System - 5 Stage

1142 reviews

NU Aqua Reverse Osmosis Water Filtration System - 5 Stage

Sale priceFrom $169.95 Regular price$199.95

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NU Aqua RO Filter

No reviews

NU Aqua RO Filter

Sale price$179.95 Regular price$239.49

Christmas Sale

16 reviews

NU Aqua RO Fitting Retainer Clip

Sale price$0.44 Regular price$0.49

Choose options

Christmas Sale

3 reviews

NU Aqua RO Membrane Housing

Sale price$11.66 Regular price$12.95

Christmas Sale

No reviews

NU Aqua RO Membrane Housing Clip

Sale price$5.36 Regular price$5.95

Christmas Sale

NU Aqua RODI Deionization Replacement Filter - front of filter

No reviews

NU Aqua RODI Deionization Replacement Filter

Sale price$35.96 Regular price$39.95

Christmas Sale

NU Aqua Tankless 600GPD Reverse Osmosis Replacement Membrane

No reviews

NU Aqua Tankless 600GPD Reverse Osmosis Replacement Membrane

Sale price$116.96 Regular price$129.95

Christmas Sale

NU Aqua Tankless 600GPD Stage 1: 4-in-1 PPCB Replacement Filter

1 review

NU Aqua Tankless 600GPD Stage 1: 4-in-1 PPCB Replacement Filter

Sale price$44.96 Regular price$49.95

Christmas Sale

Water Filter NU Aqua UV Filter Add-On Main

6 reviews

NU Aqua Ultraviolet (UV) 1140 GPD LED Water Sterilizer

Sale price$134.96 Regular price$149.95

Christmas Sale

Reverse Osmosis Replacement Water Filters NU Aqua Ultraviolet Purrifier 1GPM - top view with all components

8 reviews

NU Aqua Ultraviolet Purifier 1GPM

Sale price$80.96 Regular price$89.95

Christmas Sale

NU Aqua Undersink 3/8" Quick Change Alkaline Replacement - Front of filter

2 reviews

NU Aqua Undersink 1/4" Quick Change Alkaline Replacement

Sale price$41.36 Regular price$45.95

Flash Sale Friday

NU Aqua Undersink 3/8" Quick Change 1 Stage Filtration System

61 reviews

NU Aqua Undersink 3/8" Quick Change 1 Stage Filtration System

Sale price$52.95 Regular price$69.95

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Christmas Sale

Reverse Osmosis Replacement Water Filters NU Aqua Undersink 3/8" Quick Change 1 Stage Replacement Filter - front close up

17 reviews

NU Aqua Undersink 3/8" Quick Change 1 Stage Replacement Filter

Sale price$35.96 Regular price$39.95

Christmas Sale

2 reviews

NU Aqua Union Connector for Filter Housings

Sale price$5.36 Regular price$5.95

2 reviews

NU Aqua UV Quartz Tube O-ring

Sale price$4.99

Christmas Sale

NU Aqua Water Filter System O-Ring Set

1 review

NU Aqua Water Filter System O-Ring Set

Sale price$8.96 Regular price$9.95

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Christmas Sale

Reverse Osmosis Water Filter Housing Bracket NU Aqua With Pump Filter Housing Bracket - side angled close up

1 review

NU Aqua With Pump Filter Housing Bracket

Sale price$17.96 Regular price$19.95

Whole Home Water Purifier NU Aqua 3 Stage Whole House Water Filtration System - front of system close up with filters

1 review

OPEN BOX - NU Aqua 3 Stage Whole House Water Filtration System

Sale price$299.97 Regular price$427.95

Whole Home Water Purifier NU Aqua 3 Stage Whole House Water Filtration System - front of system close up with filters

No reviews

OPEN BOX - NU Aqua 3 Stage Whole House Water Filtration System

Sale price$373.97 Regular price$415.95

Whole Home Water Purifier NU Aqua 3 Stage Whole House Water Filtration System - front of system

No reviews

OPEN BOX - NU Aqua 3 Stage Whole House Water Filtration System

Sale price$479.97 Regular price$599.95

Flash Sale

Shower Filter NU Aqua Cartridge Main

2 reviews

Premium Shower Filter Replacement Cartridge (Delivered Every 3 Months)

Sale price$23.35

1…6 789

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Filters

City Water (19)
Well Water (12)

45PSI+ (12)
Less Than 45PSI (19)

No (19)
Yes (12)

No (19)
Yes (12)

$

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Classic RO Platinum Series (11)
Countertop Series (6)
RODI Series (5)
Shower Filters (4)
Tankless Series (7)
Under Sink (2)
Whole house (8)

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We're doing something a little different for the holidays. A lot of our customers have told us that they're worried about making a purchase before our biggest sale of the year...Black Friday. They're afraid that the price might drop a few weeks later.

To help cut down on holiday stress, we've launched our Black Friday Early Access Sale, and backed it with our Black Friday Price Guarantee. Starting with our Black Friday Early Access Sale on 11/1/23, when we put an item on sale before 12/1/23, you'll be getting it at the season's lowest price -- guaranteed. If the price drops on an eligible item, we'll refund you the difference!

Terms and Conditions

Which items are eligible?

Only items showing the "Black Friday Early Access" or "Black Friday Price Guarantee" logos are eligible

What is the Black Friday Price Guarantee?

If item is discounted even more than our Black Friday Early Access price, you will be eligible for a refund equal to the difference between your purchase price and the lowest marked price.

How can I receive my eligible refund?

In order to receive the refund, simply contact us by phone, email or live chat and provide us with your original order number. And we'll take care of it from there! In order to be eligible, you must contact us before 11:59 pm PST on 12/1/23.

How will my refund be received?

The refund will be issued to your original payment method used.

Start your holiday shopping today to make sure you get what you want for the holiday season! All Black Friday sale items have limited quantities and may sell out before Black Friday.

We're doing something a little different for the holidays. A lot of our customers have told us that they're worried about making a purchase before our biggest sale of the year...Black Friday. They're afraid that the price might drop a few weeks later.

To help cut down on holiday stress, we've launched our Black Friday Early Access Sale, and backed it with our Black Friday Price Guarantee. Starting with our Black Friday Early Access Sale on 11/1/23, when we put an item on sale before 12/1/23, you'll be getting it at the season's lowest price -- guaranteed. If the price drops on an eligible item, we'll refund you the difference!

Terms and Conditions

Which items are eligible?

Only items showing the "Black Friday Early Access" or "Black Friday Price Guarantee" logos are eligible

What is the Black Friday Price Guarantee?

If item is discounted even more than our Black Friday Early Access price, you will be eligible for a refund equal to the difference between your purchase price and the lowest marked price.

How can I receive my eligible refund?

In order to receive the refund, simply contact us by phone, email or live chat and provide us with your original order number. And we'll take care of it from there! In order to be eligible, you must contact us before 11:59 pm PST on 12/1/23.

How will my refund be received?

The refund will be issued to your original payment method used.

Start your holiday shopping today to make sure you get what you want for the holiday season! All Black Friday sale items have limited quantities and may sell out before Black Friday.

We're doing something a little different for the holidays. A lot of our customers have told us that they're worried about making a purchase before our biggest sale of the year...Black Friday. They're afraid that the price might drop a few weeks later.

To help cut down on holiday stress, we've launched our Black Friday Early Access Sale, and backed it with our Black Friday Price Guarantee. Starting with our Black Friday Early Access Sale on 11/1/23, when we put an item on sale before 12/1/23, you'll be getting it at the season's lowest price -- guaranteed. If the price drops on an eligible item, we'll refund you the difference!

Terms and Conditions

Which items are eligible?

Only items showing the "Black Friday Early Access" or "Black Friday Price Guarantee" logos are eligible

What is the Black Friday Price Guarantee?

If item is discounted even more than our Black Friday Early Access price, you will be eligible for a refund equal to the difference between your purchase price and the lowest marked price.

How can I receive my eligible refund?

In order to receive the refund, simply contact us by phone, email or live chat and provide us with your original order number. And we'll take care of it from there! In order to be eligible, you must contact us before 11:59 pm PST on 12/1/23.

How will my refund be received?

The refund will be issued to your original payment method used.

Start your holiday shopping today to make sure you get what you want for the holiday season! All Black Friday sale items have limited quantities and may sell out before Black Friday.

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