The P1+ Defender 1-Stage is a compact point-of-entry filtration system designed for condos, smaller homes, and low-demand households of 1–2 people. Installed on your main water line, it delivers cleaner, better-balanced water to every tap, shower, and fixture. With up to 400,000L or 2 years of capacity, it’s an efficient entry point into whole-home protection for lighter daily water demand.
We track your usage, manage your replacement schedule, and ship cartridges automatically, so your system stays on the right cadence without you having to think about it.
Every protection plan includes a P1 under-sink system, giving your home a second layer of purification at your main drinking faucet.
Your cartridges are replaced based on your household’s optimal cadence, helping keep your drinking, shower, and whole-home water consistently protected.
Your Defender system and P1 under-sink system are both protected for as long as your plan remains active.
Save $269 per year — $1,345 over five years — in cartridge maintenance alone.
Order summary
Your system ships within 2–4 weeks. Priority shipping available at checkout.
Backed by our 30-day Pure Promise
Your skincare starts with the water you rinse with. Residue and dryness can disrupt the skin’s surface, making creams, serums, and moisturizers less effective. Better-balanced water helps create a cleaner foundation for your products to perform.
Your shower water touches your skin, scalp, and hair every day. Water that leaves residue or disrupts the skin barrier can contribute to dryness, irritation, and rougher-feeling hair.
Ice is concentrated water. Better-balanced water helps create cleaner-tasting ice, improving the flavour of everything it touches, from water and juices to cocktails and smoothies.
Hard water and residual chlorine can dull colour and stiffen fabrics over time. Better-balanced water helps preserve the feel and longevity of your clothes, towels, and bedding load after load.
Your tap is the most direct way water enters your body. Better-balanced water makes your everyday glass taste cleaner and feel lighter, turning consistent hydration into something you actually look forward to.
Water controls the extraction of flavour. Better-balanced water helps improve taste, aroma, and mineral balance, giving coffee and tea a cleaner, smoother, more refined finish.
From boiling pasta to washing produce, water is the foundation of almost every recipe. Better-balanced water can help preserve natural flavour and texture in everything you cook.
We’re so confident you’ll notice a difference in your water that if your system does not perform as intended, you can return it within 30 days of purchase.
Get everything you need to protect the water throughout your home, from drinking and cooking to bathing, washing, and daily use.
Have your P1+ connected to your home’s main water line by a certified plumber, so every tap receives filtered water.
Connect your P1+ to the Purely app to activate your system, track capacity in real time, and start monitoring your water quality from your phone.
Continue using your water like normal, while receiving filter life updates and replacement reminders directly from your phone.
Designed for simple installation, with our experts completing timed installs in under one hour. Timing may vary depending on your home’s setup.
P1+ cartridge replacements are designed to be fast and simple, with swaps that can be completed in less than 5 minutes.
Our systems use AI to estimate your filter's remaining capacity by cross-referencing your local water quality with our tested performance standards.
Turn on automated replacements and never worry about forgetting your filter change again.
In select regions, access your area's detailed water quality report by simply entering your postal code.
Get access to our digital hub of water education, filtration insights, and industry knowledge.
Get notified when there is water quality news, updates, or advisories in your region.
Explore each P1+ system to find the right fit for your home, usage, and needs.
Find the configuration best suited to protect your family, and discover the benefits of whole-home filtration.
Whole-Home Protection
1 2-year rated capacity reflects maximum filter life under standard operating conditions. Actual filter lifespan varies based on your household’s water consumption, household size, and local contaminant load. Your system calculates your personalized replacement timeline automatically in the Purely app upon activation.
Need help choosing the right system or protection plan for your home? Our water experts are here to help. Our offices can be reached between 9:00 AM - 8:00 PM EST.
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