Installation Guide
Tools Needed:
- Adjustable wrench
- Pipe cutter
- Screwdrivers (flat and Phillips)
- Teflon tape
- Level
- Drill with bits
Step-by-Step Installation
- Choose Installation Location: Select a location under sink with access to cold water line and electrical outlet.
- Shut Off Water Supply: Turn off cold water supply under sink and relieve pressure by opening faucet.
- Mount Bracket: Install mounting bracket to wall or cabinet using provided screws.
- Connect Water Lines: Install tee fitting on cold water supply line and connect to filter system inlet.
- Connect Dispenser: Install faucet dispenser in sink deck or countertop using provided hardware.
- Connect Drain Line: Route drain line to standpipe or drain with air gap.
- Electrical Connection: Plug into grounded 120V electrical outlet.
- Flush System: Open water supply and flush system for 5 minutes to remove carbon fines.
Specifications
| Model Number | KDFM404KPS |
| Type | 4-Stage Reverse Osmosis System |
| Finish | Stainless Steel / Black |
| Filtration Stages | 4-Stage RO System |
| Daily Production | 50 gallons per day |
| Tank Capacity | 3.2 gallons |
| Filter Life | 6-12 months (pre-filters), 2-3 years (membrane) |
| Contaminant Reduction | 99% of lead, chlorine, cysts, and more |
| Water Waste Ratio | 1:1 (Advanced Permeate Pump) |
| Operating Pressure | 40-80 psi |
| Dimensions (HxWxD) | 16 x 16 x 7 inches |
| Weight | 25 lbs |
Warranty Information
- Full Warranty: 1 year parts and labor
- Membrane Warranty: 3 years on RO membrane
- Additional Coverage: Optional extended warranty available
For warranty service, contact KitchenAid Customer Service at 1-800-422-1230 or visit KitchenAid.com
Key Features
4-Stage Filtration
Comprehensive filtration system including sediment filter, pre-carbon block, RO membrane, and post-carbon filter for superior water quality.
Advanced Permeate Pump
Reduces water waste by up to 80% compared to conventional RO systems while increasing water production efficiency.
Leak Detection System
Automatic shutoff technology detects leaks and stops water flow to prevent potential water damage to your home.
Quick-Change Filters
Easy-to-replace filter cartridges with push-to-connect fittings make filter changes simple and mess-free.
Brushed Nickel Faucet
High-arc designer faucet with brushed nickel finish complements any kitchen decor while providing easy access to filtered water.
Filter Life Indicator
Electronic monitoring system tracks filter usage and alerts you when it's time to replace filters for optimal performance.
4-Stage Filtration Process
Stage 1: Sediment Filter
Removes dirt, rust, and other particulate matter down to 5 microns
Stage 2: Carbon Block
Reduces chlorine, taste, odor, and organic chemicals
Stage 3: RO Membrane
Removes up to 99% of contaminants including lead, arsenic, and fluoride
Stage 4: Polishing Filter
Final carbon filter polishes water for excellent taste and clarity
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No water from faucet | Water supply off, clogged filters, tank pressure low | Check water supply, replace filters, check tank pressure |
| Slow water flow | Clogged filters, low water pressure, restricted flow | Replace filters, check water pressure, inspect lines |
| Water leaking | Loose connections, damaged O-rings, cracked housing | Tighten connections, replace O-rings, inspect housings |
| Poor tasting water | Exhausted filters, contaminated membrane | Replace filters and membrane, sanitize system |
| System running continuously | Leaking check valve, high pressure switch | Replace check valve, adjust pressure switch |
| Alarm sounding | Filter replacement due, leak detected | Replace filters, check for leaks, reset system |
Indicator Lights & Error Codes
- Green Light: System operating normally
- Yellow Light: Filter replacement recommended soon
- Red Light: Filter replacement required immediately
- Flashing Red: Leak detected - system shut off
- Beeping Alarm: Filter change overdue or leak detected
Manual Downloads
Current Model Manuals
KDFM404KPS
4-Stage RO System with Permeate Pump
KDFM203KPS
3-Stage RO System
KDFS202KPS
2-Stage Filtration System
KDFC204KPS
4-Stage System with Chrome Faucet
Popular Previous Models
KDRS404KPS
4-Stage RO System (2022)
KDFM402KPS
2-Stage RO System (2021)
KDFS201KPS
Single Stage System (2020)
KDRP505KPS
5-Stage Premium System (2019)