P1+ Defender Series Replacement Cartridge
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.
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.
Order summary
Final taxes calculated at checkout. Ships within 1–3 weeks.
Backed by our 30-day Pure Promise


