Century B2975 1 HP 2-speed full-rate 56J pool pump motor, 230VCentury 1 HP 2-Speed Full-Rate 56J Motor, 230V, B2975 In stock$48299
Century B2975 1 HP 2-speed full-rate 56J pool pump motor, 230V
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Century 1 HP 2-Speed Full-Rate 56J Motor, 230V, B2975

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$48299
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Quick overview

  • Two speed, full rate Runs 3450 rpm on high and 1725 rpm on low, so filtration can sit on low and step up when it needs to.
  • 56J C-face frame Y56J frame with round mounting, the standard replacement pattern for threaded shaft pool pumps.
  • 230 volt Wired for 230V single phase supply at 60 Hz.
  • Sealed ball bearings Ball bearings at both ends, drip proof enclosure, thermally protected.
  • Stainless steel shaft 303 stainless, 7/16 inch threaded, so the impeller threads straight on.
  • Switching design High speed is switchless and low speed runs through a microswitch, using a permanent split capacitor design to UL 1081.
Full description and specifications ↓

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Product details

The Century B2975 is a 1 HP two speed full rate replacement pool pump motor on a Y56J C-face frame, wired for 230 volts at 60 Hz. It turns 3450 rpm on high and 1725 rpm on low.

Why two speed

Most of a pool day does not need full speed. A two speed motor lets filtration run on low, where the motor draws a fraction of the current, and step up to high for vacuuming, heating or backwashing. The design here is permanent split capacitor, switchless on high speed with a microswitch on low, built to UL 1081.

Build and mounting

Sealed ball bearings at both ends, a drip proof enclosure, thermal protection, a rolled steel frame and a 303 stainless steel shaft, threaded at 7/16 inch so the impeller screws straight on. Overall length is 13.05 inches with a 7.75 inch frame, and mounting is round.

Before ordering, compare the frame, the shaft and the voltage against the motor coming out. Nameplate output is listed as 1.0/ .12 Hp at a 1.4 service factor with SF current of 6.6/1.25 A.

From Pool School

Replace the Pool Pump Motor or the Whole Pump?The manufacturers' tests first, what each repair replaces, and the federal motor rule. Read How to Prime a Pool PumpFrom the breaker to a full pot, each manufacturer's time limit, and what to check when it won't catch prime. Read
Specifications
Brand Century
Manufacturer part number B2975
UPC 786674060174
Type Replacement pool pump motor
Output HP 1.0/ .12 Hp
Output kW 0.75 kW
Voltage 230 V
Speed 3450/1725 rpm
Number of speeds 2-2VT
Service factor 1.4
Frame Y56J
Enclosure Drip Proof
Frequency 60 Hz
Current SF 6.6/1.25 A
Shaft type 7/16" Threaded
Overall length 13.05"
Mounting Round
Shipping weight 32 lb
Ships Parcel

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Customer reviews

Questions and answers

What people ask about this product, answered by our pool techs.

What does full rate mean on a two speed motor?
A full rated motor delivers its stated horsepower at the nameplate service factor rather than being up rated on paper. B2975 is the 1 HP full rate version at a 1.4 service factor.
What supply does it need?
230 volts, single phase, 60 Hz.
Will my existing impeller fit?
The shaft is a 7/16 inch threaded 303 stainless shaft on a Y56J frame with round mounting, which is the common threaded shaft pattern. Compare the shaft and the frame against the motor you are removing before ordering.
How fast does it run on each speed?
3450 rpm on high and 1725 rpm on low.
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