The RainTree™ Undersink UF Water System
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Under-Sink Ultrafiltration (UF) Filtered Drinking Water System
Guides & Replacement Filters
Filtration Stages
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1 - Sediment Filter
The Sediment filter acts like a strainer, capturing larger particles such as sand, silt, rust, dirt and other debris suspended in the water. This filter is particularly helpful in extending the life of the following filters downstream.
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2 - Pre Carbon Filter
The Granular Activated Carbon (GAC) filter is highly effective at removing many types of impurities from your drinking water including chlorine and harmful VOC’s.
The main method of contaminant removal by the Pre Carbon filter is adsorption which particles in the water adhere to the surface of the GAC filter material. The Pre Carbon filter also serves the important purpose of protecting and extending the life of the UF (UltraFilter) Membrane.
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3 - Ultrafiltration Membrane Filter
The Ultrafilter works like a sieve, removing any particles in the water down to 0.01 micron. Some of these particles include bacteria, viruses, parasites and fungi just to name a few. One of the benefits to UF filtration, in addition to its excellent contaminant removal, is the retention of beneficial trace minerals in your drinking water.
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4 - Post Carbon Filter
Like the Pre Carbon filter, the Post Carbon filter also employs activated carbon as its filtration method. When used following the Ultra Filter Membrane, the Post Carbon filter works as a “polishing” filter, improving the taste and odor of your filtered water.
Alkaline Mineral Filter (optional)
Made of carbon block and functional ceramic balls, the Alkaline Mineral filter adds beneficial trace minerals and slightly increases the pH, making the water more alkaline. Additionally, it works to improve taste and odor.
Upgrade your system - select the Alkaline Mineral filter to replace the Post Carbon filter.
The Undersink System Details
Clean, High-Performance Drinking Water - Right Under Your Sink
This high-efficiency, space-saving undersink ultrafiltration (UF) system features a 5-6 stage inline I-type filter configuration for clean, great-tasting drinking water.
Multi-Stage Filtration Includes:
- Sediment + Carbon Filter (5 micron mesh and Carbon Block)
- Pre Carbon Filter (GAC)
- Ultrafilter Membrane (0.01 micron)
- Post Carbon Filter (GAC) or
- Optional Alkaline Mineral Filter (Carbon Block and Ceramic Balls)
Flexible Installation Options
The system can be:
- Mounted on the cabinet wall
- Placed on the cabinet floor
- Installed remotely in a temperature controlled room (e.g. laundry or basement)
Connects to a standard cold water supply using 1/4" poly tubing.
Compatible with:
- Dedicated sink-top filtered water faucet
- Refrigerator water dispenser/ice maker (bypass plug required)
- Auto-fill coffee brewers
- Instant hot drinking water heaters
Optional refrigerator connection kit available (sold separately).
What's Included
- Filters pre-installed (no assembly required)
- 8 ft of 1/4" poly tubing
- Faucet with 1/4" push fitting
- Installation connection fitting (select in options)
- Filter flushing kit
Installation Overview
- Mount faucet
- Mount system
- Connect 1/4" tubing from cold water supply to filter system inlet
- Connect 1/4" tubing from filter system outlet to faucet
- Flush filters
Installation Adapter Options
Angle Stop Adapter
Best for braided or flexible cold water risers.
Threads directly onto the cold water valve.
3/8" x 3/8" x 1/4" T Fitting
Best for rigid plastic or metal risers.
Requires cutting a 1" - 1.25" section from the riser to install.
(If installing on a metal riser, ensure cuts are clean and tubing remains round to prevent leaks).
Specifications
6.2 lbs
14.5" x 11.5" x 3.5"