The Right Water Solution For Your Home
Tailored water treatment for your home—cleaner, softer, healthier water every day.
Pure & Fresh Water
Remove chlorine, heavy metals, and hardness minerals for pure, great-tasting water right from your tap. Safe for you, your family, and your coffee mug.
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Shop Our Systems
Drinking Water Systems
Reverse Osmosis systems for clean, pure drinking water — from budget-friendly to premium tankless options.
New ArrivalSave 16%Water Doctor GF3 800GPD RO System
- 800 GPD High Flow
- Tankless Design
- Smart LED Display
In Stock
Water Doctor 5-Stage Undersink RO System
- 5-Stage Filtration
- NSF Certified Filters
- Tank Included
In Stock
On SaleSave 11%Water Doctor 4-Stage Undersink RO System
- 4-Stage Filtration
- Complete Set Included
- Professional Install
In Stock
Water Doctor COMO-R700 Tankless RO System
- 700 GPD Tankless
- GE RO Membrane
- Instant Drinking Water
In Stock
PremiumWater Doctor COMO-R1000 Tankless RO System
- 1000 GPD Max Flow
- Smart TDS Monitor
- Self-Flushing System
In Stock
Side-by-Side
Compare RO Systems
Find the right reverse osmosis system for your home by comparing key features and specs.
| Feature | GF3 800GPD $799.99$949.99 Save 16% | 5-Stage RO $570 | 4-Stage RO $799.99$899.99 Save 11% | COMO-R700 $1,199.99 | COMO-R1000 $1,499.99 |
|---|---|---|---|---|---|
| System Type | Tankless | Tank | Tank | Tankless | Tankless |
| Flow Rate (GPD) | 800 GPD | 75 GPD | 75 GPD | 700 GPD | 1000 GPD |
| Filtration Stages | 3-Stage | 5-Stage | 4-Stage | 5-Stage | 5-Stage |
| Storage Tank | No | 3.2 Gallon | 3.2 Gallon | No | No |
| TDS Monitor | |||||
| Self-Flushing | |||||
| Filter Life | 12–24 months | 6–12 months | 6–12 months | 12–24 months | 12–24 months |
| Installation | Under-sink | Under-sink | Under-sink | Under-sink | Under-sink |
| Warranty | 1 Year | 1 Year | 1 Year | 1 Year | 1 Year |
| Best For | High-demand households | Budget-friendly filtration | Essential purification | Space-saving premium | Maximum performance |
| View Details | View Details | View Details | View Details | View Details |
Tap to select up to 3 products to compare
GF3 800GPD
$799.99
$949.99
5-Stage RO
$570
System Type
Flow Rate (GPD)
Filtration Stages
Storage Tank
TDS Monitor
Self-Flushing
Filter Life
Installation
Warranty
Best For
Not sure which one is right for you?
Get a Free AssessmentHow It Works
Getting started with professional water treatment is simple. Follow these 5 easy steps to transform your water quality.
Submit Online Assessment Form
Fill out our comprehensive online assessment to help us understand your water treatment needs.
Get Expert Consultation
Connect with our water treatment specialists through online chat, email, or phone call to answer all your questions.
Make Your Purchase
Complete your order through our secure online platform with flexible payment options.
Professional Installation
Our certified technicians will schedule and complete your installation with minimal disruption.
Enjoy Pure Water
Experience the difference with clean, soft, and healthy water throughout your home.
Takes only 2-3 minutes • No commitment required
Choose by Function
Find the Perfect Solution for Your Home
Water Softener
Say goodbye to scale and hard water damage. Our smart system adapts to your water use, saving salt, water, and money.
Go To ShopRO Systems
Remove up to 99% of contaminants, including chlorine, heavy metals, and hardness minerals, for water that's pure, fresh, and great-tasting.
Go To ShopUV Disinfection
Say goodbye to scale and hard water damage. Our smart system adapts to your water use, saving salt, water, and money.
Go To ShopWhole-Home Filtration
Protect every faucet and appliance from chlorine, sediment, and harmful minerals. Clean water for every use in your home.
Go To ShopReplacements
Keep your system performing like new. Easy-to-install filters and parts for maximum water quality and system lifespan.
Go To ShopNot Sure Which Solution You Need?
Get a personalized recommendation based on your water quality, home setup, and specific needs. Our free assessment takes just a few minutes.
Get Free AssessmentOur Most Trusted Solutions
Chosen by thousands of households for proven performance.
Testimonials
What Our Customers Say
Hear from our satisfied customers about their experience with Water Doctor
"The Water Doctor team did an amazing job installing our whole house water filtration system. The water quality is noticeably better, and their service was professional from start to finish."
"Excellent service! They helped us choose the perfect under-sink filter for our kitchen. Installation was quick and clean. The team was knowledgeable and friendly."
"We've noticed a significant improvement in our water quality since installing the Water Doctor filtration system. Their maintenance service is also top-notch."
"Water Doctor installed a water filter system for my home yesterday. The two technicians came at the time promised, they are very profession, and work very efficiently. The total installation time is about 15 minutes. They gave the after-care instructions as well. I would definitely recommend Water Doctor to anyone who might needs the service."
"Installing a water softener from Water Doctor was the best decision for our home. Our dishes are spotless, appliances last longer, and our skin feels so much better after showering. The technicians explained everything clearly and set up the system perfectly."
"The comprehensive water treatment solution from Water Doctor transformed our home water quality. They installed a combined system addressing hardness, chlorine, and sediment. Their expert advice helped us choose the right solution for our specific water problems."
"I was impressed with the installation service from Water Doctor. The team arrived on time, worked efficiently, and left no mess behind. They took the time to walk me through how to operate and maintain the system, and even followed up a week later to ensure everything was working properly."
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We're here to help with all your water treatment needs
Contact Methods
Phone
+1 289-748-9666Showroom Location
601 Denison St, Markham, ON L3R 1B8
Business Hours
10:00 AM -17:00 PM