Verified specifications
| Horsepower | 1.5 HP (full-rated) |
|---|---|
| Total HP (THP) | 2.25 THP (1.5 HP × 1.50 SF) |
| Service factor | 1.50 |
| Speed | 3450 RPM |
| Voltage | 115/230V, single-phase, 60 Hz |
| Full-load amps | 21.0/10.5A |
| Frame | 56Y (square flange) |
| Enclosure | ODP |
| Shaft | 5/8" stainless steel, threaded |
Pool-duty motors: match the total HP (HP × service factor) to your pump's requirements, and confirm full-rated vs up-rated before swapping.
Dual branding: this stock number is sold interchangeably as Century and A.O. Smith — the same Regal Rexnord motor. See the A.O. Smith B2858 page.
Older variant merged: the B849 (230V-only, 10.0A) is the older variant of this motor — near-identical; match THP.
Replacement motor for Pentair Challenger, WhisperFlo WF-6, and Pinnacle pumps.
Confirming the right replacement
Before we quote, compare these fields on your failed motor's nameplate. If any of them differ, send us a photo of the nameplate and we'll match it exactly rather than guessing:
- Full model number — including any suffix letters
- HP, RPM, and voltage
- Frame size (e.g. 284T) and enclosure (TEFC, ODP, etc.)
- Full-load amps
Other Century models
- More Century modelsBrowse every Century model page we quote
- A.O. Smith B2858Same stock number under A.O. Smith branding — identical motor
Need a Century B2858?
Send the nameplate off your failed unit. We'll confirm the match and quote the B2858 or a verified equivalent with availability and lead time.
Quote this motor