O-Ring, Chicago Pneumatic part number C084400, which also shows up as 3310103714, listed at Crowder Supply as CP-C084400. 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.
The published breakdown lists it on the CP 0020 Sump Pump. Pull up the diagram and confirm the reference number for your serial before ordering.
Everything else on that machine is one page away on the parts diagram library; complete tools are on the CP tool catalog. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: C084400
- Also listed as: 3310103714
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-C084400
- Listed on breakdowns for: CP 0020 Sump Pump
