Water Doctor 2.5 x 10 Replacement Filter Cartridges – PP / CTO / GAC / T33 / RO
In stock and ready to ship
Before you reorder
Match the cartridge, lamp, or filter stage to your existing system before checkout so you do not end up with the wrong replacement part.
Still deciding between replacing a part and solving a broader water problem? Start here first.
Standard 2.5 x 10 replacement cartridges for RO and drinking water systems
These Water Doctor 2.5 x 10 Replacement Filter Cartridges are standard-size cartridges for compatible drinking water and reverse osmosis systems. Choose from PP, CTO, GAC, T33 and RO membrane options based on the stage you are replacing.
Best for
- Customers maintaining compatible 2.5 x 10 drinking water systems
- RO pre-filter and post-filter replacement
- Replacing sediment, carbon, polishing or RO stages
- Homes that want to keep replacement cartridges on hand
Available cartridges
- PP sediment cartridge
- CTO carbon block cartridge
- GAC granular activated carbon cartridge
- T33 inline taste polishing cartridge
- RO membrane cartridge
Before ordering
Please confirm your housing size and system compatibility before purchasing. These are standard 2.5 x 10 cartridges and are not the same as COMO tankless, GF3, ROS4A quick-twist or ROS4B cartridges.
Maintenance note
Replacement timing depends on water quality, usage and the cartridge type being replaced.
Product prices do not include installation unless the item is specifically sold as an installation service. Products purchased without installation can be delivered separately. When installation is purchased, delivery and installation are scheduled together and are typically completed within 1 week. Accessories and replacement parts are available for shipping or store pickup only. View warranty details.