What does the OCS CS52 water filter do?

The OCS CS52 is a refrigerator water filter that reduces chlorine taste and odor and other contaminants from your fridge's water and ice. It should typically be replaced about every six months.

What can I use to replace the OCS CS52?

You can use the genuine OCS CS52 or a compatible aftermarket filter. We list 2 compatible options above, and the Amazon buttons show current pricing for both the original and replacements.

Who makes the OCS CS52?

The OCS CS52 is an OEM part associated with Cuno. Compatible aftermarket versions are made by several third-party brands and are often less expensive.

Replacement water filter

OCS CS52

Cuno OCS CS52 replacement water filter — what it is and where to buy

Type: Refrigerator water
Brand: Cuno

Buy genuine OCS CS52Original equipment manufacturer part See OCS CS52 replacementsCompatible aftermarket options, often cheaper

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The OCS CS52 is a refrigerator water filter made by Cuno. Below are compatible replacement filters, the equivalent part numbers it's also sold under, and appliances known to use it. Use the buttons above to compare current prices on Amazon.

Compatible replacement filters

640565

Bosch 640565 Refrigerator Water Filter

Bosch

Replaces 58 parts

640565

Bosch 640565 Refrigerator Water Filter

Bosch

Replaces 58 parts

Equivalent & related part numbers

Appliances that use the OCS CS52

Bosch B20CS5
Bosch B20CS50SN
Bosch B20CS50SNB
Bosch B20CS50SNB 01
Bosch B20CS50SNB-01
Bosch B20CS50SNB/01
Bosch B20CS50SNB/02
Bosch B20CS50SNB01
Bosch B20CS50SNI
Bosch B20CS50SNI-01
Bosch B20CS50SNI/01
Bosch B20CS50SNI/02

A sample of known compatible models. Confirm your model before buying.

OCS CS52 — frequently asked

What does the OCS CS52 water filter do?: The OCS CS52 is a refrigerator water filter that reduces chlorine taste and odor and other contaminants from your fridge's water and ice. It should typically be replaced about every six months.
What can I use to replace the OCS CS52?: You can use the genuine OCS CS52 or a compatible aftermarket filter. We list 2 compatible options above, and the Amazon buttons show current pricing for both the original and replacements.
Who makes the OCS CS52?: The OCS CS52 is an OEM part associated with Cuno. Compatible aftermarket versions are made by several third-party brands and are often less expensive.