Individual Replacement Filter
Granular activated carbon: reduces chlorine, taste, and odor ahead of the membrane.
Optional add-ons
Faster filter changes—without tools or broken fingernails.
Automatically shuts off the water supply when its detection pad gets wet.
What it does
Helps reduce chlorine before water reaches the next filtration stage.
Helps reduce unpleasant taste, odor, discoloration, and organic compounds.
Supports more consistent UF or RO membrane performance.
Pre Carbon configuration
The Pre Carbon Filter follows the Sediment Filter and comes before the UF or RO membrane.
This filter
The Raintree™ Pre Carbon Filter contains granular activated carbon that helps reduce chlorine, unpleasant taste and odor, discoloration, and organic compounds before the water reaches the next filtration stage. Positioned after the sediment stage, it provides important protection for downstream filtration, especially chlorine-sensitive reverse osmosis membranes, while improving the water before final treatment.
| Filter format | 12 inches tall × 2.5 inches in diameter, I-type |
|---|---|
| Connections | 1/4 inch |
| Ports | 2 (1 inlet, 1 outlet) |
| Filter media | Granular activated carbon |
| Water flow rate | 0.5 GPM (1.9 LPM) |
| Rated filtration volume | 5,400 L / approximately 1,427 gallons |
| Maximum pressure | 113 PSI |
| Maximum temperature | 100°F (38°C) |
| Housing / origin | Polypropylene / Made in Korea |
Confirm the 12 × 2.5 inch I-type format, 1/4-inch connection style, available space, filter position and flow direction.
Replace at the rated volume, when flow or water quality declines, or at least annually if the rated volume is not reached. Sediment and carbon pre-filters may require more frequent replacement depending on water usage, incoming water quality, sediment load, chlorine level, and other contaminant loading.
Install after the Sediment Filter and before the UF or RO membrane. When using the combined Sediment + Carbon Filter, a separate Pre Carbon Filter may not be necessary unless additional carbon capacity is desired.
NSF component tested and certified to NSF/ANSI Standard 42. For potable, municipal, cold-water applications only. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.
Why Raintree™
With 20+ years of water filtration experience, we supply carefully selected, high-quality replacement filters for dependable performance, simpler maintenance and great-tasting water.
Confirm your fit with the details below or in our FAQ, or ask us, and we guarantee it. Unopened sets can be returned within 90 days.
Made with NSF-certified materials for dependable multi-stage filtration and a clean, great-tasting finish.
Responsive, friendly, personalized guidance from our filter experts, before and after you order.
Orders typically ship the same or next business day. Free shipping on orders over $55.
Get your replacement filter delivered on your schedule, with no need to remember when it’s time.
Compatibility reference
Expand a brand to view the complete reference list, then confirm the installed filter and connection style and the membrane type before ordering.
Compatible replacements for:
Important: Wellsys systems use both compatible push-fit connections and incompatible proprietary twist-on cartridges. Confirm the installed style.
Configurations vary. Send the model number and clear photos of the installed filters so we can confirm compatibility.
Converting from factory Crystal Quest filters requires No-Tool Fittings. For a combined UF+RO cooler, choose the RO replacement filter set.
View Crystal Quest page →Configurations vary. Send the model number and clear photos of the installed filters so we can confirm compatibility.
Vertex filters often have female ports; No-Tool Fittings may be needed when changing to Raintree™ male-port filters.
All brand names are trademarks of their respective owners. Raintree™ filters are compatible replacements and are not manufactured, endorsed by or affiliated with any of them.
