Ordering by number: this is P083082, also listed as 3310103712, the Chicago Pneumatic O-Ring. It keeps air or oil where it belongs inside the pump. Once it flattens or hardens, the machine loses pressure across the joint and performance falls off gradually rather than all at once.
It appears on the CP 0020 Sump Pump breakdown. Compare it to the reference callout on the diagram to be sure it is the position you need.
The rest of the assembly is on the same breakdown, and every diagram we publish is indexed on the parts diagram library. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: P083082
- Also listed as: 3310103712
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-P083082
- Listed on breakdowns for: CP 0020 Sump Pump
