The OmniFilter OW40 Housing Wrench, also known as part number SW-2, fits the following OmniFilter housings:
- OB1 Series A
- OB5 Series A
- R12 Series A
- U25 Series E
This product was known previously as model numbers OW40-R-01 and OW40-R-02 and is now known by model number OW40-R6-05.