The black Purely P1+ Whole Home Filtration Defender Series replacement cartridge, studio shot on black
Close-up of the P1+ Defender replacement cartridge's top connector with white sealing ring
Whole-home filtration

P1+ Defender Series Replacement Cartridge

4.9 · 203 reviews
$375CAD

The Purely P1+ Defender replacement cartridge is compatible with all Defender whole-home systems. Designed to restore peak filtration performance across your full water supply, with each cartridge delivering up to 400,000 L of clean water capacity.

Select your cartridge

Whole-Home Performance Refresh

Restores your Defender system’s filtration capacity for clean water throughout the home.

Seamless Cartridge Replacement

Homeowner-friendly cartridge swaps completed in under 5 minutes, with no professional installation required.

Universal Defender Compatibility

Compatible with all Defender systems, including 1-Stage, 2-Stage, and 4-Stage configurations.

FO Technology

Powered by advanced filtration media for high-flow, long-lasting whole-home performance.

Up to 400,000 L

Each cartridge provides up to 400,000 L of filtration capacity before replacement.

Free Canada-wide shipping
30-day satisfaction guarantee
Up to 2 Years of protection

Order summary

SystemP1+ Defender Replacement Cartridge
Total
$375

Final taxes calculated at checkout. Ships within 1–3 weeks.

Backed by our 30-day Pure Promise