Tier1 Bosch 640565 / CS-52 Refrigerator Water Filter Replacement Comparable

Price $20.99
Availability: In stock
Choose a quantity
  • 1 Filter $20.99  
  • 3 Filters Price $19.99 each
  • 6 Filters Price $18.99 each
  • Installs quickly, requires no tools
  • Reduces many common water contaminants
  • Lasts for up to six months, or 300 gallons, depending on use
  • A cost effective alternative to expensive brand name refrigerator water filters
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A Bosch 640565/CS-52 and Whirlpool WHKF-IMPLUS Refrigerator Water Filter Replacement comparable, the Tier1 RWF1100 is an ideal solution for your filtration needs. The RWF1100 installs quickly and easily, no tools are required. The filter begins working almost immediately, reducing contaminants ranging from chlorine to silt, for up to six months. Whether you are a city dweller or reside in a country retreat, the RWF1100 is suited for your filtration needs. Start serving only the finest drinking water, order the Bosch 640565/CS-52 and Whirlpool WHKF-IMPLUS comparable Tier1 RWF1100 today!

Installation Guide

Package Qty 1
Used In Brands Bosch, Tier1
Manufacturer's Id RWF1100
UPC 635510407683
Actual Size (in) 8-7/8 inches (length) x 2-1/2 inches (height) 2-1/2 inches (width)
Actual Size (cm) 22.5425 x 6.35 x 6.35
Primary Filter Media Activated Carbon Block
Filter Life (gallons) 300
Filter Life (liters) 1,135.62
Filter Life (months) 6 months
Micron Rating (Nominal) 0.5
Operating Pressure (psi) 30 - 125
Operating Temperature (°F) 38 - 100
Operating Temperature (°C) 3.3 - 37.8
Flow Rate (gpm) 0.5
Flow Rate (lpm) 1.89
Certifications Filter cartridge has been Tested and Certified by NSF International against NSF/ANSI 42 for materials and structural integrity requirements
Warranty Guarantee Unconditional Product Guarantee for Life of the Product
Primary Filter Media Activated Carbon Block


Reduces the following contaminants:

  • Chlorine Taste & Odor
  • Rust and Corrosion
  • Sand
  • Sediment
  • Silt
  • Turbidity

The TIER1-RWF1100 is comparable with the following part numbers

00640565 1257074 176346 2168701
55866-05 55866-06 5586605 5586606
56932 640565 70020002518 Aqua-Pure C-CS-S
AP3961137 B20CS5 B20CS8 C-CS-S
CS-450 CS-451 CS-452 CS-51
CS-52 CS52 CS450 CS451
CS452 EAP8729485 EVOLFLTR10 OCS CS52
OCS 55866-06 PD00005729 RWF-1100 RWF1100
SGF-BO50 SGF-BO52 Ultra-Ease UltraEase
W1085590 WF-297 WF297 WHCF-R-PLUS
WF297 WF-297 EFF-6026A EFF6026A
EFF6026 EFF-6026 RWF1100 RWF-1100
SGF-BO50 SGF-BO50 BO50 WD-640565 WD-CS-52

The TIER1-RWF1100 fits the following model numbers


Installation Guide


  1. Note: Filter must be pushed firmly into receiver and turned until filter is locked in place. If filter is not locked correctly, water will not flow.
  2. DO NOT use any tools to install this filter
  3. Shut off water supply
  4. Twist the old filter a quarter-turn counterclockwise and remove
  5. Insert new filter into the refrigerator receiver, push the new filter until it stops
  6. Twist the filter a quarter-turn clockwise
  7. Reset water filter status display
  8. Flush filter with 3-4 gallons of with water until water runs clear. Some noise is not uncommon as air is purged from the system.
  9. If filter sits for several days without use, flush a quart of water through the filter to remove stale water from refrigerator water lines

Reset Instructions

  1. Press the water filter reset button and hold for 3 seconds