A.O. Smith ST1102 Replacement

Verified specifications

Full-rated vs up-rated: pool pros match total HP (THP = label HP × service factor), not label HP. Full-rated motors carry a higher service factor than up-rated motors of the same label HP — never swap one for the other without matching THP.

56J fitment: threaded C-face mount — the Hayward Super Pump / Super II / Max-Flo and Jacuzzi Magnum class.

Single-speed and CA/NY: California and New York require variable-speed replacement motors (Title 20) for most pool pump replacements; see the VGreen Evo line. In other states, single-speed replacements remain standard.

Shaft seal: replace the pump shaft seal whenever the motor is changed — a leaking seal is the #1 killer of new pool pump motors.

Dual branding: this stock number is sold interchangeably as A.O. Smith and Century — Regal Rexnord's aftermarket motor brand. Same motor, same specs; see the Century ST1102 page.

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 A.O. Smith models

• More A.O. Smith modelsBrowse every A.O. Smith model page we quote
• Century ST1102Same stock number under Century branding — identical motor