"Definitely a must-have in every home. Efficient, cost-effective, and better for the planet. No brainer."
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P1+ Defender Series
Whole-home filtration, tailored to your home’s capacity needs. Powered by Fiber Technology to deliver clean, filtered water throughout your entire home.
Trusted by 10,000+ homes across Canada
Natalia Bielecki
Katherine Garbarino
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P1+ Defender 4-Stage
Whole House Water Filtration System
CA$2,450.00
CA$2,649.00
CA$199.00OFF
The P1+ Defender 4-Stage is a high volume point-of entry whole-home filtration system that installs on your home’s main water line. Designed for large-sized families of 5+ members, it delivers a consistent, refined water experience throughout your entire home. Every tap, shower, and drop in your home protected. With a capacity of up to 1,600,000L or 2 years, depending on usage, it’s a long-term upgrade you effortlessly feel every day.
Choose Option
P1+ Defender 4-Stage
CA$2,450.00
- Quad Stage Whole Home Protection
- 2 years of coverage
Maximum Capacity
P1+ Defender 2-Stage
CA$1,299.00
- Dual Stage Whole Home-Protection
- 2 years of coverage
Most Popular
P1+ Defender 1-Stage
CA$699.00
- Single Stage Whole Home Protection
- 2 years of coverage
Compact Coverage
Flexible financing options available at checkout for approved applicants. See Details.
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Designed to reduce up to 98% of 80+ common tap water contaminants.
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Powered by Fiber Technology for dependable, long-term performance.
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Independently tested filtration media designed to meet world-class certification standards.
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Low maintenance with seamless cartridge replacements.
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30-day risk free trial.
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Tested &
Certified
Certified
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Safe & Secure
Payments
Payments
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30 Day
Free Trial
Free Trial
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Benefits
- Noticeably cleaner water for drinking, bathing and cooking
- Designed to be gentle on skin and preserve hair vitality
- Helps protect fabrics, fixtures and appliances from harsh municipal water
- Compact, installation-friendly footprint
- A sustainable alternative to bottled water and plastic waste.
- Confidence at every tap — protection that runs in the background
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How it Works
- Main-line installation
- Integrated service bypass
- 1 hour professional install
- Protection at every tap
- See Installation Guide for more details
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Box Contents
- 2 x Defender System Housing (Dual Unit Assembly)
- 4 x Filter Cartridges
- Connection PVC Manifold Adapter Set + Stoppers
- Locking Clips
- Mounting Screws
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Specifications
- Type: 4-Stage Dual Unit Parallel Whole-Home filtration system equipped with Fiber Technology
- Capacity: 1,600,000L
- Replacement Cadence: 2 Years
- Sized for: Homes of 5+ people
- Peak Flow: Up to 20 GPM
- Max Pressure: 120 PSI
- Temperature Range: 40-90°F (4-32°C)
- Plumbing Connection Size: 1"
- Dimensions:
- Height: 25.5"
- Width: 9.5"+6" manifold
- Depth: 10.5"
Trusted by Leaders
Purely partners with leading creators, businesses, and organizations to advance water awareness, empower communities, and deliver innovative filtration solutions.
Natalia Bielecki
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Katherine Garbarino
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Benefits Across the Home
See how the Defender impacts the moments and routines water touches most.
Drinking
Daily hydration starts at the source. Enjoy cleaner, better-tasting water from every tap in your home, with over 100 common impurities reduced.
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Showering
Reducing chlorine and impurities in your shower water supports softer-feeling skin and healthier-feeling hair.
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Clothing
Chlorine wears on fabrics over time. Reducing it helps preserve softness, color, and the longevity of your clothing.
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Coffee
Creates a smoother, more balanced cup with better water at the source.
Produce
Cleaner rinsing for fruits and vegetables, from prep to plate.
Pets
Gives your pets the same cleaner, high-quality water you rely on every day.
Why Fiber Technology?
Our structured fiber technology is designed for consistent filtration, strong flow, and a longer-lasting filter—so performance stays steady over time.
Beyond Granules
Traditional filters rely on loose granules that shift over time. As water finds the path of least resistance, filtration can become less even—and the media wears out quickly.
Smarter Structure
A dense, fibrous media creates high surface area and more contact time with the water—guiding flow evenly through the filter for smoother, more consistent performance.
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Compact Footprint
More available surface area makes high-performance filtration possible in a smaller format. The P1+ is built to fit cleanly and easily into homes, condos, and apartments.
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Longevity
Fiber technology is built to remain evenly structured over time and resist channeling—the result: up to 2 years of use when properly sized to your home’s water needs.
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Full Flow
The highly permeable fiber membrane allows water to pass through quickly, delivering consistent flow and uninterrupted pressure throughout your home.
Find the Right P1+ for Your Home
Each Defender system is tailored to family size, helping us match filtration capacity to your home’s water usage so replacement cadence remains consistent across the lineup.
Model
Capacity
Family Size
Typically For
Replacement Cadence
P1+ 1-Stage
400,000L
1-2 People
Apartments, Condos, Small Homes
Every 2 Years
P1+ 2-Stage
800,000L
3-4 People
Family Homes, Town-Houses
Every 2 Years
P1+ 4-Stage
1,600,000L
5+ People
Large Family Homes
Every 2-3 Years
Replacement recommendations are based on an average water use of 250L per person, per day, compared to system capacity. This determines appropriate replacement cadence.
What Our Customers Are Saying
Real stories from people who've experienced cleaner water, better health, and peace of mind.
Rhonda Massad
Owner of West Island News
Natalia Bielecki
Office Manager at Clinique Ophtalmo MTL
"Water is a huge part of my life. I use the filtration system every day definitely a must-have for everyone."
Katherine Garbarino
Owner of KGMTL
"I have one in my kitchen and bathroom sink. It’s an essential part of my wellness routine."
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Melanie McKell
Owner of extensions MTL
"Unfiltered water can seriously affect the quality of our hair and skin. I definitely recommend a Purely filter for both drinking and showering."
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Angela Lucia
Owner at Coiffure Blunt
"Our entire salon is filtered, and our clients have definitely noticed a difference."
Ivana Gentile
Award Winning Stylist & Colorist
"Highly recommended for haircare. Clean water is the foundation of strong, healthy hair."
Francesco Feudale
President at Plomberie Urgence Montréal (PUM)
"Great systems happy to be working with Purely as an installation partner."
"I'm a huge stickler when it comes to the quality of the water I drink. Keanu from Purely was a breeze to deal with and extremely helpful. The device itself was very easy to install and the result speaks for itself. I can honestly say that my tap water has become my favorite hydration source. And the before/after difference is incredible. Definitely recommend!"
Charlie K
"I purchased two shower heads and an under the sink filter and I absolutely love both products. Firstly, the shower head has helped my hair become so much more healthy and shinny, I no longer feel that residue from regular tap water. Secondly, the under the sink filter was so easy to install and I haven’t had to replace my cartridge in over a year! I would highly recommend."
Chanel
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"I had a great experience working with Purely Solutions from start to finish. The team was professional, responsive, and genuinely focused on delivering quality results. They took the time to understand exactly what I needed and followed through with clear communication and attention to detail. I am very happy with their products and costumer service."
Sean
"The best filtration systems on the market hands down. I’ve been using purely products for almost 4 years now, I started with their P1 under sink filter and noticed in a major change in water taste and for cooking. Adding the S1 shower filter was a life changer for my skin and hair. Highly recommend all Purely products!"
Massimo N
"The best filtration systems on the market hands down. I’ve been using purely products for almost 4 years now, I started with their P1 under sink filter and noticed in a major change in water taste and for cooking. Adding the S1 shower filter was a life changer for my skin and hair. Highly recommend all Purely products!"
Massimo N
"I had a great experience working with Purely Solutions from start to finish. The team was professional, responsive, and genuinely focused on delivering quality results. They took the time to understand exactly what I needed and followed through with clear communication and attention to detail. I am very happy with their products and costumer service."
Sean
"I purchased two shower heads and an under the sink filter and I absolutely love both products. Firstly, the shower head has helped my hair become so much more healthy and shinny, I no longer feel that residue from regular tap water. Secondly, the under the sink filter was so easy to install and I haven’t had to replace my cartridge in over a year! I would highly recommend."
Chanel
"I'm a huge stickler when it comes to the quality of the water I drink. Keanu from Purely was a breeze to deal with and extremely helpful. The device itself was very easy to install and the result speaks for itself. I can honestly say that my tap water has become my favorite hydration source. And the before/after difference is incredible. Definitely recommend!"
Charlie K
Tool-Free by Design
Cartridge replacements are seamless, no tools, no mess. Deisgned to be done by the homeowner, so maintaining clean water is simple from start to finish.
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Consistent Filtration. Our fiber media stays uniformly structured, guiding water through the filter evenly results remain consistent over time.
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Expanded Surface Area. The unique fibrous structure provides up to 3× more surface area than conventional granular carbons increase efficiency without adding bulk.
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Superior Impurity Reduction. Designed to target a wide range of tap water impurities like chlorine, VOCs, and heavy metals with over 100 common impurities reduced.
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Compact & Long-Lasting. High-performance media in a compact footprint built for longer life, higher efficacy, and fewer replacements.
See the Difference
Compare Fiber Technology to conventional alternatives.
ACF
Others
GAC/PAC Filters
Size/Form Factor
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Replacement Longevity
Adsorption Speed
Environmental Impact
Filtration Consistency
Maintenance / Clogging
Surface Area
Results are based on third-party testing and published data comparing Activated Carbon Fiber (ACF) to conventional carbon filters.
Frequently Asked Questions
Everything you need, answered—so choosing cleaner water feels effortless.
Do you offer installation?
We work with a trusted network of plumbing partners across Canada and can help coordinate installation for you. Our partners are familiar with our systems and can ensure the installation is completed smoothly and correctly.
Where available, we handle the coordination process and help connect you with the right installer for your area.
Can I get my own plumber to do the installation?
Absolutely! Any licensed plumber can install the system with ease. It is a straightforward installation that can typically be completed in around one hour, we provide detailed installation guides and manuals to make the process seamless from start to finish.
How are replacements done, and do they require a plumber?
Replacement is designed to be simple and homeowner-friendly. In most cases, cartridge replacements are DIY and can be completed in under five minutes.
A plumber is not required for standard replacement, and we also provide a detailed step-by-step guide to make the process as easy as possible.
How do I know which Defender system is right for my family?
As a general guideline, we typically recommend:
1–2 people: 1-Stage
3–4 people: 2-Stage
5+ people: 4-Stage
This gives us a strong starting point, which we can then tailor based on your home and usage patterns.
How do you determine the replacement cadence?
By using an industry standard formula of 250L per day, per person, multiplied by the number of people in the home. From there, we compare that estimated household usage to the capacity of the system and recommend a system designed to fall within an approximate two-year replacement cadence. If your home or water usage calls for a different timeline, we tailor the recommendation accordingly.
When will I know it’s time to replace my filters?
We will notify you when it is time to replace them. Your replacement cadence is tailored based on your home size, the number of people in the home, and your overall water usage habits, so the timing is aligned with your household’s actual needs.
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Need help choosing the right water filtration solution?
Our water experts are here to help, schedule a call at a time that works for you.
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Try Purely for 30 Days
Every system is backed by our 30-day satisfaction guarantee, so you can experience Purely in your home with confidence.
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Get 10% Off Your Order Now
Make the effortless decision to upgrade your most essential input; your water. Your purchase helps bring safe water to communites in need, while giving your home cleaner, healthier water every day.
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