Motor, Century, 1.0hp, 115v/230v, 1-Spd, 56Jfr, C-Face Thd | B128

💧 Motor, Century, 1.0hp, 115v/230v, 1-Spd, 56Jfr, C-Face Thread

Made by Century, manufacturer part number B128. It is listed for the equipment shown below, so check the model on your own unit against that list.

✅ Listed for

• Jacuzzi Brothers Cygnet Series
• Jacuzzi Magnum/Magnum Plus/Magnum Force/Magnum Force 3 Pumps
• PC EP Model Pumps Jacuzzi P
• Jacuzzi PH & UPH Model Pumps
• Jacuzzi Magnum Force/Magnum Force 3 Canadian Model Pump
• Jacuzzi Magnum High Flow Canadian Model Pump
• P PC UP Model Pumps Jacuzzi Ring-Lok R
• Jacuzzi RC Model Pump
• Pentair American Products American Eagle Pump
• Pentair Purex Quietflo/Aquatron Pumps
• Waterco HydroStorm Pool Pump
• Waterco HydroStar (2-1/2″) Self Priming Semi-Commercial Pump
• Waterco HydroStorm Plus Pool Pump
• Jandy JHP & JHPU Pumps
• Jandy HHP & HHPU Pumps
• Val-Pak/AquaFlo Dominator Medium & High Head Pump
• w/Copper Insert AquaFlo Dominator Medium & High Head Pump
• Speck Pumps S90/BADU® EcoM2 Inground & Commercial Pool Pump
• Speck Pumps 72/BADU® EcoMV Inground & Commercial Pump
• Universal Replacement Pump Speck Pumps EasyFit® Pump Series

CAT: B128 MODEL: 164303 TYPE: CX FR: M HP: 1.0 SF: 1.40 PH: 1 HZ: 60 RPM: 3450 ROT: CW

VOLTS: 230/115 AMPS: MAX AMPS: SF AMPS: 7.2/14.4 TIME: CONT ENCL: ODP THERMALLY PROTECTED FORM: CODE: J INSUL CLASS: B AMB.: 50°C

Century replacement pool pump motor – 1 HP, 115V / 230V, single speed, 56J frame

⚙️ What this motor is

This is a replacement motor only, not a complete pump. It is a c-face motor, which you can recognise by a round flange that bolts to the pump's seal plate. It is a 56J frame with a threaded shaft. It runs on 115V / 230V, single speed. It bolts to the wet end you already have, so the pump housing, impeller and plumbing stay where they are.

✅ Check these before you order

• Compare total horsepower, not nameplate horsepower. Multiply the horsepower on your old motor’s label by the service factor printed next to it. This one is 1.4 HP total. Two motors labelled differently can be the same motor once you do that sum.
• Mounting. A C-face motor will not fit a square flange wet end, and no adapter exists, so check yours matches before ordering.
• Frame size. Measure across the round body of the motor: roughly 5-1/2 to 5-7/8 inches is a 48 frame, roughly 6-1/2 to 6-3/4 inches is a 56 frame. Measuring beats reading the old label, because some makers labelled 48 frame motors as 56. This one is a 56J frame.
• Shaft. This motor has a threaded shaft. A threaded shaft has the impeller screwed straight onto it; a keyed shaft is smooth with a groove down it. The two are not interchangeable.
• Voltage. This motor is 115V / 230V. Read it off the old motor’s label rather than assuming from the wiring – a spa wired for 240V can still run a 120V pump.
• Height. The capacitor sits in a raised hump on top of this motor, so measure your clearance if it sits under a spa skirt or below low plumbing.

🔧 When you fit it

• Fit a new shaft seal at the same time. A failed shaft seal lets water into the motor and is the most common reason a motor dies. Reusing the old one on a new motor is the quickest way to ruin it.
• Rotation. Pool and spa motors turn counter-clockwise seen from the shaft end, shown on the label as CCW or CCWPE. They cannot be reversed by swapping wires, so check the old label if it says anything different.
• Keep the horsepower the same unless you are changing the impeller too – the impeller is matched to the motor’s output.

🔩 Technical specifications

🔧 Parts and fittings for this