Jacuzzi 9249000, Y660000 & BG94000 Replacement Pump – HB21000 J-Pump

Restore your Jacuzzi whirlpool bathtub with the HB21000 J-Pump replacement. This 120V, single-speed bath pump is designed to replace compatible Jacuzzi J-Pump installations using the distinctive Jacuzzi-style threaded plumbing connections.

The pump operates at 7 amps and 3450 RPM and includes a built-in air switch and attached power cord. Its bottom-suction, center-discharge configuration closely matches many older Jacuzzi whirlpool pumps, helping minimize plumbing modifications when the original connections are compatible.

Not sure whether it fits? Send Whirly Bros clear photos of your original pump label, plumbing connections and complete installation. Call or text (951) 897-1878 for help confirming compatibility before ordering.

Why Choose the HB21000 Jacuzzi J-Pump?

• Designed for compatible Jacuzzi whirlpool bathtubs
• Replaces numerous discontinued Jacuzzi pump numbers
• Jacuzzi-style threaded plumbing connections
• Bottom suction and center discharge
• Built-in air switch for air-button operation
• Standard attached power cord
• Single-speed 120V operation
• Physically inspected by Whirly Bros

HB21000 Pump Specifications

Primary part number	HB21000
Pump style	Jacuzzi J-Pump
Application	Whirlpool bathtubs
Voltage	115–120V AC
Motor amperage	7.0 amps
Motor speed	3450 RPM
Speed	Single speed
Activation	Built-in pneumatic air switch
Electrical connection	Attached power cord
Suction position	Bottom suction
Discharge position	Center discharge
Plumbing connections	Jacuzzi-style threaded pump connections

What Is Included?

• HB21000 Jacuzzi-style J-Pump
• Built-in pneumatic air switch
• Attached power cord

Please note: Pump unions, O-rings, air tubing and air buttons are not included unless specifically shown or selected separately.

Compatible and Replacement Part Numbers

The HB21000 is designed to replace compatible Jacuzzi whirlpool bath pumps identified by the following part numbers:

• 9249000
• 9248000
• 9219000
• C847000
• C846000
• H412000
• BG94000
• Y660000
• Y659000
• CE35000
• K796000
• 1010023
• JWB and JLB pump applications

Common Motor Identification Numbers

The following motor numbers may appear on compatible older Jacuzzi pump assemblies. These numbers are provided to help identify the original pump and do not guarantee compatibility by themselves:

• K37GWBLC-607
• K37GWBLA-605
• K37GWBLA-607
• K37GWBTY-754
• K41GWAAB-1001

Compatibility and Fitment

Jacuzzi used several similar-looking J-Pumps with different motor ratings, controls, mounting arrangements and plumbing configurations. A matching part number is helpful, but the complete installation should be inspected before ordering.

Confirm that your original system has:

• A 115–120V electrical supply
• A motor rating close to 7 amps
• Single-speed operation
• An air button connected to a pneumatic air switch
• Bottom suction and center discharge
• Jacuzzi-style threaded union connections
• Sufficient space for the replacement motor and mounting base

Important: This pump uses Jacuzzi-style plumbing connections and is not interchangeable with pumps using standard industry union fittings. Compare the threads, connection style and wet-end orientation with your original pump before purchasing.

Important Installation Notes

• Disconnect electrical power before beginning installation.
• Connect the pump only to a properly grounded and GFCI-protected 115–120V supply.
• Never operate the pump without water in the bathtub.
• Inspect the original unions and O-rings before installation and replace worn seals.
• Do not apply thread tape to union connections that seal with O-rings.
• Hand-tighten the unions evenly; excessive force can damage the pump connections.
• Connect the bathtub’s air-button tubing securely to the pump’s built-in air switch.
• Secure the pump on a stable, level mounting surface to reduce movement and vibration.
• Confirm there are no leaks before restoring normal operation.

Installation should be completed by a qualified technician when electrical access, plumbing alignment or system compatibility is uncertain.

Frequently Asked Questions

Does this pump replace Jacuzzi 9249000?

It is designed to replace compatible 9249000 installations using a 115–120V, approximately 7-amp J-Pump with an air switch and matching Jacuzzi-style plumbing connections. Verify the original label, connection style and wet-end orientation before ordering.

Does it replace Jacuzzi Y660000 or BG94000?

Yes, the HB21000 is commonly used as the current replacement for compatible Y660000 and BG94000 pump installations. Some versions may have different brackets or mounting arrangements, so photographs should be reviewed before ordering.

Is this a hot-tub pump?

No. This model is intended for compatible indoor Jacuzzi whirlpool bathtubs. It should not be selected for a portable hot tub or spa solely because the Jacuzzi name appears on the equipment.

Does the pump include an air switch?

Yes. The pneumatic air switch is built into the pump. The bathtub’s existing air button sends a pulse of air through a small tube to switch the pump on and off.

Will my original unions fit?

Compatible Jacuzzi J-Pump unions may fit the replacement pump, but they should be compared carefully with the product photos. Standard pump unions are not interchangeable with the Jacuzzi-style threaded connections.

Are unions and O-rings included?

No. Unions and O-rings are not included unless specifically shown or selected separately. Inspect your existing seals before reusing them.

Why do some listings describe this pump as 7.5 amps?

Specifications found in older documents and third-party listings may vary. The pump offered on this page has been physically inspected and is rated at 7.0 amps. Always compare the actual product specifications with the label on your original pump.

Can Whirly Bros confirm whether it fits?

Yes. Send clear photos of the complete pump, motor label, plumbing connections and control arrangement. Call or text (951) 897-1878 for assistance.

Why Buy from Whirly Bros?

• Specialists in whirlpool bathtub replacement parts
• Product physically inspected for key electrical and plumbing details
• Same-business-day shipping on qualifying orders
• Free U.S. shipping on orders over $100
• Compatibility assistance by phone or text
• Support from people familiar with discontinued bath-pump installations

Need help identifying your pump? Call or text Whirly Bros at (951) 897-1878 and send us photos before ordering.

Jacuzzi and all referenced manufacturer names and part numbers are used solely for identification and compatibility purposes. Whirly Bros is an independent replacement-parts supplier and is not affiliated with or endorsed by Jacuzzi or any other referenced manufacturer. Compatibility depends on the original pump specifications, plumbing connections, electrical configuration, mounting arrangement and available installation space.