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Pentair Reverse Osmosis System – Watermart

4.8

  • Advanced 4-Stage Filtration 
  • High Efficiency & 41.05% Recovery Rate 
  • Delivers 21 Gallons of Pure Water Per Day 
  • Tool-Free, Quick Cartridge Changes
  • NSF/ANSI 42, 53, 58 Certified
  • Compact & Space-Saving Design
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Free shipping

On all orders

100% Risk free

30 days free trial

5 Year Warranty

On all orders

Reviews

Hear What Customer Have to Say

M.B

Marissa Bretton

Toronto, Canada

5.0

“Arlyn is very friendly and efficient. She did a wonderful job in fixing our tap and replacing our filter. I’m very pleased.”

E.C

Eric Chan

Toronto, Canada

5.0

“Great service and communication, easy process with Watermart!”

A.W

Andrea Webster

Toronto, Canada

5.0

“Was on time and courteous. Did a good job installing.”

L.S

Luk Steve

Toronto, Canada

5.0

“Great product First class service! Highly recommended. I purchased a water softner works great and the service is excellent”

L.C

Loreto Cristini

Toronto, Canada

5.0

“Zia from Watermart did an amazing job installing a whole house and reverse osmosis water filtration system in my house.”

M.J

Kumiko Imai

Toronto, Canada

5.0

“I recently had a Watermart technician come to change the filter on our water system and I was really appreciative of the service and process.”

Trusted by Leading Brands & Institutions!

Featuring Our New Pentair Reverse Osmosis 

Pure Water, Pure Peace of Mind…

Pentair Reverse Osmosis
Advanced Multi-Stage Filtration Process

Advanced Multi-Stage Filtration Process

The Pentair RO system features an advanced 4-stage filtration method that eliminates up to 99% of the contaminants, including lead, chlorine, and other harmful substances from your tap water.

High Efficiency and Recovery Rates

High Efficiency and Recovery Rates

This system offers a 41.05% recovery rate to minimize water waste while producing the maximum possible output. Furthermore, the state-of-the-art filtration technology ensures top-notch purity, leaving you with pure water ideal for cooking and drinking purposes.

High-Capacity, Consistent Output

High-Capacity, Consistent Output

The Pentair Reverse Osmosis system is equipped with a substantial capacity that delivers a robust 21 gallons of pure water per day, eliminating waiting around for a refill. The consistent flow rate of our system allows you to enjoy fresh, filtered water for drinking, cooking, gardening, and more.

Excellent Add-On to Restore Essential Minerals.

Reverse osmosis systems can strip healthy minerals from your water.

But you can reintroduce vital minerals, such as calcium, magnesium, and potassium, back into your filtered water to enjoy pure, healthy, and alkaline water anytime you want by adding one filter to restore essential minerals.

Benefits of Alkaline Water

Your body tends to absorb alkaline water more readily, which promotes optimal hydration. Alkaline water helps neutralize excess acidity in your body, which supports overall health and well-being. Above all, alkaline water offers antioxidant properties that help protect your cells from damage.

Core Product Features of the Pentair Reverse Osmosis System

  • A powerful 50 GPD membrane that eliminates a wide range of contaminants and PFAS to deliver the purest water possible
  • Effortless maintenance through our quick, tool-free cartridge changes that make upkeep a breeze
  • Seamless installation with ⅜” push-fit connections that are compatible with various plumbing systems
  • Superior safety with a built-in check valve that protects your water supply from backflow contamination
  • Phenomenal filtration with our dual-technology cartridges, combining sediment and carbon block filtration for maximum performance
  • Cost-effective and sustainable solution in place of plastic water bottles
  • A monitored system that sends timely alerts for optimal filtration
  • Advanced air gap faucet that prevents cross-contamination, keeping your water pure and safe

Pressure Range

40 to 100 psi (2.75–6.89 bar)

Temperature Range

40–100°F (4.4–37.8°C)

TDS Limit <2000 ppm

<2000 ppm

Maximum Hardness

<10 gpg (170 mg/L)

Chlorine in Water Supply

<2 ppm

pH Limits

3–11

Overall Dimensions

14.57″W x 5.46″D x 12.54″H (370mm x 139mm x 319mm)

Weight

8.9 lbs (4.0 kg)

Tank Capacity

3.2 gal (12.1 L)

Tank Dimensions

10.91″DIA x 14.61″H (277mm DIA x 371mm)

Tank Air Pressure Empty

5-7 psi (0.34-0.48 bar)

Tank Weight (Full)

25.50 lb (11.6 kg)25.50 lb (11.6 kg)25.50 lb (11.6 kg)25.50 lb (11.6 kg)25.50 lb (11.6 kg)

Certifications

NSF/ANSI Standard 42, 53, 58 for reducing specific contaminants

Our Pentair Reverse Osmosis System Ensures Optimal Water Quality

With our Pentair Reverse Osmosis System, you can experience the visible difference in the taste and quality of your tap water, ultimately leading to an improved lifestyle. Our system is proven to remove up to 99% of the contaminants, keeping you and your family in the best of their health.

Schedule Your Free Water Consultation
Improved Taste

Improved Taste

Our advanced filtration system doesn’t just purify water; it also elevates it.
It features a specialized post-filter that eliminates any lingering odors or impurities that may affect the taste of your water adversely and leaves you with water that’s not just clean, but incredibly refreshing to taste.

Certified Performance

Certified Performance

With recognized certifications, we deliver peace of mind.
The Pentair 4-Stage Reverse Osmosis System is rigorously tested and certified by NSF International against NSF/ANSI Standards 42,53, and 58, and is proven to reduce a wide range of harmful contaminants, including arsenic, lead, and cysts. By removing them, you get crystal-clear water and reduced environmental impact.

Low Maintenance Requirements

The Pentair Reverse Osmosis System is incredibly user-friendly and designed with your convenience in mind. With minimal effort, you can enjoy pure water with easy filter access, making replacements a simple task. Our system sends automatic reminders to maintain performance and water quality.

Flexible Installation and Maintenance

Our system is specifically designed for easy, under-sink installation that fits effortlessly into your kitchen with accessible components for easy maintenance.
The automatic flush ensures superior performance and increases the life of your system while the quick and easy filter changes deliver a seamless, tool-free experience.

Compact and Space-Saving Design

Compact and Space-Saving Design

The compact and sleek design of our Pentair RO System makes installation easy, under your sink. The space-saving design allows for more space without compromising on performance, delivering pure, fresh water for many years to come.

Tankless Reverse Osmosis System Vs Tank—Which Is Better?

If you’re planning to switch to a Reverse Osmosis System, one of the major decisions is whether to go for a traditional tank-based system or a tankless systems. 


Tank-based and modern tankless systems have their own pros and cons, depending on your needs.

Here’s how to choose the right system for your home.

Product Size

459×160×443mm

Power

120W

Faucet

with smart water faucet(can show the TDS value, filter life)

Power Supply

100-240v～50/60Hz

Feed Water Source

Municipal tap water

Pure water flow

800GPD(2.23L/min)

Working Pressure

0.1-0.4Mpa(14.5-58psi)

Inlet/Outlet size

1/4″

Flush Method

Auto flush

Filtration Type

PPC+RO+CPF(C+PP),(alkaline ilter or mineral water filter)

Filtration Accuracy

0.0001μm

App-Controlled

Yes

Type

Under-Sink

Pure water flow

800GPD(2.1L/min)

Water temperature

5℃~38℃

Control Your Water Quality with Smart Faucet

Get real-time information about the quality of your water with our smart faucet equipped with TDS monitoring technology.
With this, you can also:

  • Keep a close eye on your water’s purity and take immediate action if TDS levels rise
  • Get a sense of security and reassurance that your quality of water is maintained
  • Detect early problems with your system or water source
  • Make informed decisions about when to use filtered water for drinking, cooking, or other purposes

General Contaminants

Chemical Contaminants

Advanced Chemical Contaminants

Volatile Organic Compounds (VOCs):

Dirt

2,4-D

Dichloroacetonitrile

Tetrachloroethylene

Rust

Dibromochloroproane (DBCP)

Trichloroacetonitrile

Toluene

Suspended Particles

o-dichlorobenzene

Halo ketones (HK)

1,2,4-trichlorobenzene

PFAS

1,2-dichloroethane

1,1-dichloro-2-propanone

1,1,1-trichloroethane

Chlorine

1,1-dichloroethylene

1,1,1-trichloro-2-propanone

1,1,2-trichloroethane

Chloramine

cis-1,2-dichloroethylene

Heptachlor (H-34, Heptox)

Trichloroethylene

Lead

trans-1,2-dichloroethylene

Heptachlor epoxide

Trihalomethanes

Aluminium

1,2-dichloro propane

Hexachlorobutadiene

Chloroform

Alachlor

cis-1,3-dichloropropylenedinosed

Hexachlorocyclopentadiene

Bromoform

Atrazine

Endrin

Lindane

Bromodichloromethane

Benzene

Ethylbenzene

Methoxychlor

Chlorodibromomethane

Carbofuran

Ethylene dibromide (EDB)

Pentachlorophenol

Xylenes

Carbon Tetrachloride

Haloacetonitriles (HAN)

Simazine

2,4,5-TP (silvex)

Chlorobenzene

Bromochloroacetonitrile

Styrene

Tribromoacetic acid

Chloropicrin

Dibromoacetonitrile

1,1,2,2-tetrachloroethane

1,2-dichloropropane

The filter cartridge is tested and certified by NSF international standards against NSF/ANSI standard 42 for material safety requirements only

The filter cartridge is tested and certified by WQA against
NSF/ANSI standard 42 for
material safety requirements only

The filter cartridge is tested and
certified by the Water Quality
Association to WQA/ASPE/ANSI
S-803 for sustainability

Why Choose Watermart? 

We Guarantee Pure, Safe Drinking Water.
At Watermart, we believe you deserve the cleanest, healthiest water possible with no contaminants and sediments. Our advanced state-of-the-art system is engineered to deliver superior water quality while reducing plastic waste and saving you tons of money.

30 Years of Pure Excellence

30 Years of Expertise

We’ve been at the forefront of water purification technology for over three decades now. Our customer satisfaction speaks of our unwavering dedication to quality and commitment. At Watermart, we believe water is essential to life, and that everyone has a right to get the purest, cleanest water at home that keeps them healthy.

Customer Satisfaction

We deliver the quality you can always trust.
Our products undergo rigorous quality checks and testing to ensure they adhere to industry standards. We’ve been in the business for over 30 years and are backed by NSF/ANSI that prioritize your health and safety.

Advanced Certification

Over 10,000 happy customers trust us…
We’re a trusted name in water treatment solutions that serve thousands of customers every month. Our top-notch quality and phenomenal customer and after-sales services make us the best-selling industry leader in Toronto.

Upgrade to WaterMart Water Filters Today!

Buy a water test kit

Reviews

“Arrived on Time, Worked Diligently.…

“We recently had a reverse osmosis system installed by Watermart. The installer Zia was excellent – arrived on time, worked diligently and clearly explained initial procedures to follow post installation. Happy to have a water filter system installed for our family.“

Victor Cotic

“So knowledgeable and Patient…

“Justin from Watermart came and serviced our reverse osmosis water system. He was so knowledgeable and patient with all our questions. What a pleasure to have someone like Justin come to our home. WaterMart is lucky to have him.”

Sherry Sherry

“I Would Highly Recommend…

“Kamran and Zia were very friendly and answered all of my questions. They came in to do the annual service for my reverse osmosis filter system.
I highly recommend Watermart to anybody that wants high quality drinking water.”

Kyle Santos

“I Would Highly Recommend…

“Highly recommend WaterMart for reverse osmosis service. Zia was great! He was on time, explained everything to me, and made recommendations for what we needed and would work best for our system. He was also lovely to our cat!
Thanks for your help Zia! Looking forward to seeing you at the next service call :-)”

Chloé Bayliss

“Very Helpful and Knowledgeable…

“We ordered service to replace water tank for our RO filter system, the old tank got ruptured bladder. The service technician – Justin – came right on time, was very helpful and knowledgeable. Replaced the tank, gave some good advices and recommendation. Would definitely use them again if needed ! Thank you Justin !”

Anas Dabbakh

“I Would Highly Recommend!…

“We have had 2 installations through Watermart, each for both a reverse osmosis filter and water softener. Our recent installation was performed by Zia and he was amazing. They came quickly as we just moved, and completed the work with the utmost of courtesy and professionalism. Highly recommend this company!”

Bernard Ockrant

Featuring Our New tankless reverse osmosis water filter system

Pure Water, Pure Peace of Mind…

tankless reverse osmosis
Your Only Water Filtration Solution

Your Only Water Filtration Solution

Our Green 2:1 tankless RO water filter system is more than just a water filter; it’s a commitment to your health and overall physical and mental well-being. With its advanced reverse osmosis technology, our tankless RO water filter system delivers 99% water purification, surpassing all other options on the market.

Save Money, Save the Planet

Save Money, Save the Planet

Our advanced system features a 2:1 low drain ratio, meaning you’ll produce significantly less wastewater than traditional RO systems. This cannot only save an average family of 4 up to $200 per year in water bills but also contribute to a healthier environment.

800 GPD Flow Rate

800 GPD Flow Rate—16x More than Traditional Reverse Osmosis Systems

Imagine the convenience of our tankless RO system that delivers an impressive flow rate of 800 gallons per day (GPD); a remarkable 16 times faster than traditional RO systems. This means you can enjoy a constant supply of clean, filtered water without waiting.

Excellent Add-On to Restore Essential Minerals.

Reverse osmosis systems

Reverse osmosis systems can strip healthy minerals from your water.

But you can reintroduce vital minerals, such as calcium, magnesium, and potassium, back into your filtered water to enjoy pure, healthy, and alkaline water anytime you want by adding one filter to restore essential minerals.

Alkaline Water

Benefits of Alkaline Water

Your body tends to absorb alkaline water more readily, which promotes optimal hydration. Alkaline water helps neutralize excess acidity in your body, which supports overall health and well-being. Above all, alkaline water offers antioxidant properties that help protect your cells from damage.

Core Product Features

  • This product features a strontium-rich-post-carbon filter that provides enhanced filtration and pure, alkaline water that is rich in essential minerals.
  • Smart faucet technology to monitor water quality and filter life in real-time
  • A generous flow rate of 800 gallons per day of pure, clean, and filtered water
  • App-controlled convenience to manage the system settings and monitor performance through our user-friendly app
Product Size459×160×443mm
Power120W
Faucetwith smart water faucet(can show the TDS
value, filter life)
Power Supply100-240v～50/60Hz
Feed Water SourceMunicipal tap water
Pure water flow800GPD(2.23L/min)
Working Pressure0.1-0.4Mpa(14.5-58psi)
Inlet/Outlet size1/4″
Flush MethodAuto flush
Filtration TypePPC+RO+CPF(C+PP),(alkaline ilter or mineral water filter)
Filtration Accuracy0.0001μm
App-ControlledYes
TypeUnder-Sink
Pure water flow800GPD(2.1L/min)
Water temperature5℃~38℃

Our Vigorous 5-stage tankless RO water filtration system Delivers The Purest Water Possible

The innovative tankless RO water filtration system features multistage filtration, suitable for global water. With high-quality and precision filter elements, it removes harmful pollutants, including bacteria, viruses, and heavy metals. The 5-stage filtration process ensures the quality of your water is 99% pure and pristine.

tankless RO water filtration system
Pre-Filter

Pre-Filter

Removes larger particles, such as rust, silt, and dirt to prevent clogging and improve the efficiency of your system

Central Purifier

Central Purifier

Eliminates contaminants as tiny as 0.01 microns, ensuring your water is free from harmful bacteria, viruses, and other impurities

Central Water Softener

Central Water Softener

Removes scale buildup; calcium and magnesium ions, and improves the appearance of your home appliances. Also, improves your skin and hair texture.

Under Sink Water Filter

Under Sink Water Filter

Removes larger particles, such as rust, silt, and dirt to prevent clogging and improve the efficiency of your system

Dispenser

Dispenser

Delivers instant hot water for your cup of coffee or tea. Simply press a button and you’re good to go!

Tankless Reverse Osmosis System Vs Tank—Which Is Better?

If you’re planning to switch to a Reverse Osmosis System, one of the major decisions is whether to go for a traditional tank-based system or a tankless systems. 

Tank-based and modern tankless systems have their own pros and cons, depending on your needs.

Here’s how to choose the right system for your home.

Space Saving Design
Tankless RO SystemIt is a compact and sleek design without a storage tank. Ideal for homes with limited space.

Tank-based RO System
It requires a storage tank and takes up significant space under your sink
Water Purity
Tankless RO System
Freshly filtered water is delivered on demand with minimal risk of contamination.

Tank-based RO System
If not maintained timely, the water stored in tanks may risk bacterial growth. 
Filtration Speed

Tankless RO System		An advanced filtration system allows for faster filtration speed and no reliance on tanks.

Tank-based RO System
It heavily relies on filling a tank over time. Therefore, it offers slower filtration speed.
Installation & Maintenance

Tankless RO System		Easy installation with low maintenance 

Tank-based RO System		Complex installation and requires regular cleaning of the tank
Cost-efficiency
Tankless RO System
Higher initial investment with long-term cost savings

Tank-based RO System		Affordable with low initial investment
Water Waste

Tankless RO System		Water-efficient and eco-friendly option

Tank-based RO System		Wastes more water during filtration

Control Your Water Quality with our Smart Reverse Osmosis System faucet

Get real-time information about the quality of your water with our smart faucet equipped with TDS monitoring technology.
With this, you can also:

Keep a close eye on your water’s purity and take immediate action if TDS levels rise

Get a sense of security and reassurance that your quality of water is maintained

Detect early problems with your system or water source

Make informed decisions about when to use filtered water for drinking, cooking, or other purposes.

Smart Faucet
General ContaminantsChemical ContaminantsAdvanced Chemical ContaminantsVolatile Organic Compounds (VOCs):
Dirt2,4-DDichloroacetonitrileTetrachloroethylene
Rust Dibromochloroproane (DBCP)TrichloroacetonitrileToluene
Suspended Particleso-dichlorobenzeneHaloketones (HK)1,2,4-trichlorobenzene
PFAS1,2-dichloroethane1,1-dichloro-2-propanone1,1,1-trichloroethane
Chlorine1,1-dichloroethylene1,1,1-trichloro-2-propanone1,1,2-trichloroethane
Chloraminecis-1,2-dichloroethyleneHeptachlor (H-34, Heptox)Trichloroethylene
Leadtrans-1,2-dichloroethyleneHeptachlor epoxideTrihalomethanes
Aluminium1,2-dichloropropaneHexachlorobutadieneChloroform
Alachlorcis-1,3-dichloropropylenedinosedbHexachlorocyclopentadieneBromoform
AtrazineEndrinLindaneBromodichloromethane
BenzeneEthylbenzeneMethoxychlorChlorodibromomethane
CarbofuranEthylene dibromide (EDB)PentachlorophenolXylenes
Carbon TetrachlorideHaloacetonitriles (HAN)Simazine2,4,5-TP (silvex)
ChlorobenzeneBromochloroacetonitrileStyreneTribromoacetic acid
ChloropicrinDibromoacetonitrile1,1,2,2-tetrachloroethane
1,2-dichloropropane

The filter cartridge is tested and certified by NSF international standards against NSF/ANSI standard 42 for material safety requirements only

The filter cartridge is tested and certified by WQA against
NSF/ANSI standard 42 for
material safety requirements only

The filter cartridge is tested and
certified by the Water Quality
Association to WQA/ASPE/ANSI
S-803 for sustainability

Why Choose Watermart? 

Our advanced tankless reverse osmosis system is certified against NSF/ANSI 42 for material safety requirements and NSF/ANSI 58 for TDS reduction. The methoxychlor and lindane reduction rate of Watermart’s reverse osmosis system is up to 99%.

tankless reverse osmosis
30 Years of Pure Excellence

30 Years of Pure Excellence

For over three decades, Watermart has been a trusted name in water filtration and purification. Our commitment to quality and customer satisfaction has earned us a reputation as a leading industry expert.

Certified Performance

Third-Party Certified

We maintain the highest industry standards, ensuring that our products meet superior quality and safety requirements. Our certifications provide you with peace of mind and confidence in your purchase.

Serving Over 10,000 Satisfied Customers

Join the thousands of satisfied customers who have experienced the benefits of Watermart’s innovative products and exceptional service over 30 years.

Sleep Soundly & Live Happily with Noise-Free Water Filtration

Unlike other tankless RO systems, our tankless system offers remarkably low noise levels, typically below 50 decibels for a peaceful environment, better sleep, and reduced stress, creating a more peaceful and relaxing atmosphere.

Schedule a FREE Water Consultation

Water Filter Systems FAQs

Check out the common questions we get below.

We recommend replacing the filters every 12 to 24 months to maintain the water quality and overall performance of your RO system. However, the exact replacement schedule depends on many factors, including water usage, household size, and the quality of your tap water.

Yes, you can easily connect your RO systems to refrigerators or ice makers. However, if you wish to use this option, make sure the icemaker is turned off during the initial installation and flushing.

If the water starts tasting odd with a bad odor, it’s time for maintenance and filter replacement. Also, make sure to flush the system for 5 minutes after a prolonged period of non-use.

If the water starts tasting odd with a bad odor, it’s time for maintenance and filter replacement. Also, make sure to flush the system for 5 minutes after a prolonged period of non-use.

Yes, the system is designed to be energy efficient. It utilizes a high-recovery membrane that minimizes water wastage, significantly reducing the amount of water sent to the drain compared to conventional RO systems .

Regular maintenance is straightforward and primarily involves replacing filters and checking the system for leaks. The system includes an automatic flush feature that helps maintain membrane cleanliness and performance .

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