This is the Chicago Pneumatic O-Ring part number C084173 (also carried as 3310103916), Crowder SKU CP-C084173. Seals like this one are consumables in a pump they are cheap, they age with heat and hours, and replacing the whole set during a teardown saves a second strip-down later.
You will find it on the diagram for the CP 0020 Sump Pump. Pull up the diagram and confirm the reference number for your serial before ordering.
If you need the parts around it, the parts breakdown index has the full breakdown library, and the Chicago Pneumatic tool range covers the machines themselves. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: C084173
- Also listed as: 3310103916
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-C084173
- Listed on breakdowns for: CP 0020 Sump Pump
