Raintree™ Undersink Ultrafiltration System
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Quick & Easy Installation
NSF-Certified Materials
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Replace Every 12 Months
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Free Shipping Over $55
100% Satisfaction & Compatibility Guarantee
Quick & Easy Installation
NSF-Certified Materials
Free Shipping Over $55
Replace Every 12 Months
Most Orders Ship Same-Day
Subscribe & Save 10%
Free Shipping Over $55
Under-Sink Ultrafiltration (UF) Filtered Drinking Water System
Under-Sink Ultrafiltration (UF) Filtered Drinking Water System
Regular price
$189.00 USD
Regular price
Sale price
$189.00 USD
Quantity
Couldn't load pickup availability
Why Choose the Raintree™ Water Filtration System
Reliable, multi-stage filtration for clean, great-tasting water.
Multi-Stage Filtration
Reduces sediment, chlorine, bacteria, and contaminants while retaining essential minerals for clean, great-tasting water.
NSF Certified Materials
Components manufactured with NSF-certified materials for safe, high-quality performance.
Easy Installation
Designed for straightforward under-sink setup using standard household tools and push-fit connections.
Long-Lasting Filters
Filters last up to 12 months, saving you money and reducing waste
Filter Set Components
Primary Filters
1. SEDIMENT + CARBON
- New and improved, now with added carbon block!
- Dual-stage filter design for better water filtration
- Stage 1: captures particles such as sand, silt, rust, dust, dirt, and pipe residue
- Stage 2: features a carbon block that reduces chlorine and other unwanted impurities
2. PRE CARBON
- Granular Activated Carbon filter uses adsorption process
- Contaminants are attracted and adhere to the carbon material like velcro
- Reduces chlorine, VOCs, THMs, and other unwanted impurities
- Protects and extends the life of the Ultrafilter Membrane
3. UF MEMBRANE
- Semi-permeable membrane that physically traps suspended particles as small as 0.01 micron
- Reduces bacteria, cysts, microplastics
- Excellent contaminant removal
- Allows beneficial trace minerals and fluoride to remain in the finished water
Choose Your Final Stage
Select your polishing filter
4. POST CARBON
- Premium 20x40 mesh granular activated coconut shell carbon
- Improves taste and reduces unwated odors
- Delivers a smooth, fresh finish
- Completes the filtration process for optimal water quality
4. ALKALINE MINERAL
- Carbon block and functional ceramic ball media
- Adds beneficial trace minerals for better-tasting water
- Raises pH to produce mildly alkaline water
- Improves taste and reduces odors
- Provides a crisp, refreshing finish
- Final conditioning stage for optimal water quality
+ $30.00
Optional Add-On
Refrigerator Connection Kit
Allows you to connect the undersink filtration system to a refrigerator, ice maker, auto-fill coffee brewer, etc.
Can be used with or instead of a dedicated filter faucet
Kit Includes:
- 15ft of 1/4" poly tubing
- 7/16" refrigerator inlet adapter
- 1/4" T fitting
+ $30.00
Details
- High-efficiency, space-saving drinking water filtration system featuring a 5-6 stage Ultrafiltration setup (number of stages based on selected configuration).
- Easy installation and filter changes with no-tool filter replacements
- NSF certified materials and components
- 5-year limited warranty
- Lifetime technical support
- 90-day money back guarantee
Connects to standard cold water supply using 1/4" poly tubing
Compatible with the following:
- Dedicated sink-top filtered water faucet
- Auto-fill coffee brewers
- Instant-hot drinking water heaters
- Refrigerator waterdispenser/ice maker
When connected to a refrigerator, this system replaces the manufacturer's filter using a bypass plug (sold separately - search your refridgerator model number to identify the correct plug)
- Sediment + Carbon filter (5 micron mesh and Carbon Block)
- Pre Carbon filter (GAC)
- UF Membrane (0.01 micron)
- Post Carbon (GAC) or Alkaline Mineral filter (Carbon Block and Ceramic Balls)
- 8 ft of 1/4" poly tubing
- Installation connection fitting
- Filter flushing kit
Designed for straightforward under-sink installation using standard household tools.
Installation is simple:
- Mount faucet
- Mount undersink system
- Connect 1/4" tubing from cold water supply riser to filter system inlet
- Connect 1/4" tubing from filter system outlet to filter faucet
- Flush filters
For typical residential use:
- Replace all filters every 12 months
- If incoming water is high in sediment or chlorine, replace the Sediment and Pre Carbon filters every 6-9 months
Angle Stop Adapter
Best for braided or flexible cold water risers.
- Threads directly onto the cold water valve.
- The riser nut then threads onto the top of the adapter.
.................
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 insert the fitting.
- Push tubing firmly into fitting until fully seated.
- Gently pull to confirm secure installation.
- (If installing on a metal riser, ensure cuts are clean and tubing remains perfectly round to prevent leaks).
- Weight: 6.2 lbs
- Dimensions: 14.5" x 11.5" x 3.5"