💪 Sundance® Jacuzzi® LX Series Spa Pump 6500-845 — 1.5 HP 2-Speed 115V 48 Frame

OEM TheraFlo replacement pump for powerful jets and quiet filtration

♨️ Product Overview

The 6500-845 is the current-production Sundance® / Jacuzzi® OEM replacement TheraFlo spa pump, manufactured by Guangdong Lingxiao (LX) as model 48WUA1501C-II (NF). This 1.5 HP, 2-speed jet pump operates at 115V/60Hz and delivers high-speed massage performance at 3,450 RPM with energy-efficient low-speed filtration at 1,725 RPM — eliminating the need for a separate circulation pump in many installations.

Designed as the baseless/bracketless (NF) configuration, this pump mounts to a universal bracket (6000-532, sold separately) and features a rotatable wet end that can be moved left or right to match your existing plumbing. With 2″ MBT connections, side discharge, and compatibility with Sundance® Solo, Caprio, and Tango models as well as Jacuzzi® J-200 and J-300 Series spas, this pump is the direct factory-authorized replacement for a wide range of discontinued Sundance and Jacuzzi pump part numbers including 6500-345, 6500-090, 6500-758, and many more. Unions are not included; pump cord is sold separately.

⭐ Key Features

• ✅ 1.5 HP Output / 2-Speed Operation — High speed (3,450 RPM) for massage jets; low speed (1,725 RPM) for quiet filtration and circulation
• ✅ 115V / 60Hz — Standard US 115-volt operation drawing 13.8A high speed and 3.8A low speed
• ✅ Sundance® / Jacuzzi® OEM Part — Factory-authorized replacement pump (Part No. 6500-845)
• ✅ Baseless / Bracketless Design (NF) — Mounts to universal bracket 6000-532 for flexible positioning
• ✅ Rotatable Wet End — Can be moved left or right to accommodate existing plumbing configurations
• ✅ 48Y Frame (Small Frame / Thru-Bolt) — Compact design for Sundance and Jacuzzi equipment bays
• ✅ 2″ MBT Ports (Suction & Discharge) — Male Buttress Thread connections for 2″ inner diameter plumbing
• ✅ Side Discharge — Rotatable to match plumbing layout
• ✅ Mechanical Seal — Ensures watertight operation during long-term continuous use
• ✅ Can Be Wired as Single-Speed — Also replaces single-speed 6500-357 when wired for high speed only
• ✅ 1-Year Manufacturer Warranty — Factory-backed warranty from Guangdong Lingxiao (LX)

📊 Technical Specifications

Specification	Value
OEM Part Number	6500-845
LX Model Number	48WUA1501C-II (NF)
Manufacturer	Guangdong Lingxiao Pump Industry Co., Ltd. (LX)
Spa Brands	Sundance® / Jacuzzi®
Pump Name	TheraFlo / Thermax
Pump Type	Jet Pump — Baseless / Bracketless (NF)
Motor Power (Output)	1.5 HP
Speed Settings	2-Speed (High and Low)
High Speed RPM	3,450 RPM
Low Speed RPM	1,725 RPM
Max Power (High Speed)	1.62 kW
Max Power (Low Speed)	0.40 kW
Voltage	115V
Frequency	60 Hz
Amperage (High Speed)	13.8A
Amperage (Low Speed)	3.8A
Flow Rate Max (High Speed)	528 L/min (139.5 GPM)
Flow Rate Max (Low Speed)	252 L/min (66.6 GPM)
Maximum Head (High Speed)	16.7 m (54.8 ft)
Maximum Head (Low Speed)	3.5 m (11.5 ft)
HP Max (High Speed)	2.0 HP (input)
HP Max (Low Speed)	0.45 HP (input)
Frame Type	48Y (Thru-Bolt / Small Frame)
Base / Feet	Baseless — No Feet (NF)
Mounting Bracket Required	6000-532 (sold separately)
Discharge Port Size	2″ MBT (Male Buttress Thread)
Suction Port Size	2″ MBT (Male Buttress Thread)
Discharge Location	Side — Rotatable
Suction Location	Center (front face)
Thread Outer Diameter	3-1/16″ (accommodates 2″ pump union)
Maximum Water Temperature	50°C (122°F)
Liquid Temperature Range	4°C to 50°C (39°F to 122°F)
Storage Temperature	-10°C to 50°C (14°F to 122°F)
Max Relative Humidity	95%
Unions Included	No — Purchase separately
Cord Type	None — Cord not included (reuse existing or purchase separately)
Applicable Standards	UL 1563, UL 1081
Warranty	1 Year (Manufacturer)

⚡ Electrical Requirements

Electrical Spec	Requirement
Supply Voltage	115V
Frequency	60 Hz
Phase	Single
Full Load Amps (High Speed)	13.8A
Full Load Amps (Low Speed)	3.8A
Wiring	4-Wire for 2-Speed: Common (White), Low Speed (Black), High Speed (Red), Ground (Green)

⚠️ IMPORTANT:

All electrical work must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local building codes.

Hot tubs require GFCI (Ground Fault Circuit Interrupter) protection — install a GFCI in the circuit per NEC requirements.

A dedicated circuit is required — do not share with other appliances.

Permanently ground the motor using the green ground terminal provided within the motor end shield. For US installations, use a solid copper conductor, size 8 AWG or larger. For Canadian installations, a 6 AWG or larger solid copper bonding conductor is required.

The electrical connection must be carried out by qualified staff following UL 1563 and UL 1081 standards.

Single-Speed Wiring Option: This 2-speed pump can also be wired as a single-speed pump by connecting only the high-speed terminal and leaving low speed unconnected (using a 3-wire cord instead of a 4-wire cord). This makes it a replacement for single-speed pump 6500-357.

🔄 Compatibility Guide

This Pump:

• 📐 Frame: 48Y (Thru-Bolt / Small Frame)
• 📐 Base: Baseless (NF) — Requires bracket 6000-532
• 📐 Discharge: 2″ MBT — Side discharge (rotatable)
• 📐 Suction: 2″ MBT — Center (front face)
• 📐 Thread OD: 3-1/16″

Compatible Sundance® Spa Models:

• ✅ Solo (1999+)
• ✅ Caprio (2000+)
• ✅ Tango (2000–2003)
• ✅ Tango (1997–1999)
• ✅ Denali (2015+)

Compatible Jacuzzi® Spa Models:

• ✅ J-200 Series
• ✅ J-300 Series

Replaces the Following Part Numbers:

Part Number	Notes
6500-345	Direct predecessor — now discontinued, replaced by 6500-845
6500-090	Earlier version
6500-122	Earlier version
6500-135	Earlier version
6500-258	Earlier version
6500-259	Earlier version
6500-293	Earlier version
6500-594	Earlier version
6500-722	Earlier version
6500-758	Earlier version
6500-759	Earlier version
6500-793	Earlier version
6500-357	Single-speed version — wire high speed only
SD6500-845	Alternate prefix format
SD6500-345	Alternate prefix format
SD6500-793	Alternate prefix format
SUN6500-845	Alternate prefix format
15-850-0845	Alternate format
390614	Alternate cross-reference
4154213-S	Balboa part number
4154213-B	Balboa part number
T55MWBLJ-962	Motor only (Emerson)
T55MWCNT-1432	Motor only (Emerson)

⚠️ Important: This is a baseless/bracketless (NF) pump. If your existing pump has feet/base welded on, you will need the mounting bracket 6000-532 (sold separately), or you can reuse your existing bracket. The current version may be approximately 2″ longer (17.5″ overall) than some earlier 6500-845 models (15.6″ overall) — verify physical fit in your pump bay before purchasing.

🛠️ Installation Requirements

Mounting:

Requirement	Specification
Mounting Position	Horizontal only
Mounting Method	Universal bracket 6000-532 (sold separately) or reuse existing bracket
Base Type	Baseless (NF) — No welded feet
Rating Label	Must remain visible after installation
Location	Do not install within an outer enclosure or beneath the skirt of a hot tub or spa

Plumbing:

Connection	Size
Suction	2″ MBT (center, front face)
Discharge	2″ MBT (side, rotatable)
Thread OD	3-1/16″ across threads

Installation Notes:

⚠️ Wet end can be rotated left or right to match existing plumbing — rotate to match your configuration before tightening

⚠️ Pump must be installed with flooded suction — never run the pump dry, as this causes seal and motor damage

⚠️ Suction pipe should be as short as possible for optimal performance

⚠️ Ensure proper grounding and bonding per NEC requirements (8 AWG solid copper for US, 6 AWG for Canada)

⚠️ GFCI protection is required by code for all hot tub and spa installations

⚠️ Verify that the pump shaft turns freely before initial start-up

⚠️ Check that the rotation direction matches the arrow indicated on the fan cover

⚠️ Verify physical fit — current version may be 2″ longer than some earlier production models

🔧 Maintenance Guide

Routine Maintenance:

Task	Frequency	Notes
Check for leaks	Monthly	Around seal and union connections
Inspect unions and fittings	Monthly	Tighten if needed — ensure good seal
Clean strainer/filter	As needed	Remove debris to maintain flow
Check amperage	Annually	Should match rated 13.8A high / 3.8A low
Inspect motor vents	Quarterly	Keep clear of debris for cooling
Check bracket mounting	Quarterly	Ensure bracket is secure and pump is stable

Warning Signs — Replace Pump If:

• Unusual noise (grinding, screeching, humming)
• Water leaking from mechanical seal
• Motor trips breaker repeatedly
• Reduced water flow through jets
• Motor overheating or burning smell

Extended Storage:

If the pump will be idle for an extended period, the manufacturer recommends disassembling, cleaning, and storing it in a dry, well-ventilated place.

Cleaning Procedure (from Manufacturer):

1. Fill spa with water up to nozzle level
2. Operate pump for 2–3 minutes
3. Drain water from spa after motor stops

🎯 Ideal Applications

Application	Suitability	Notes
♨️ Sundance® spa jet pump	✅ Yes	OEM replacement for Solo, Caprio, Tango, Denali
♨️ Jacuzzi® spa jet pump	✅ Yes	OEM replacement for J-200 and J-300 Series
♨️ Spa filtration/circulation	✅ Yes	Low speed provides energy-efficient filtration
♨️ Single-speed replacement	✅ Yes	Can replace 6500-357 by wiring high speed only

❓ Frequently Asked Questions

Q: What horsepower is this pump? A: The output power is 1.5 HP continuous. The input power is 2.0 HP at high speed and 0.45 HP at low speed per the manufacturer PDF.

Q: Will this fit my Sundance spa? A: This pump is the OEM replacement for Sundance Solo (1999+), Caprio (2000+), Tango (1997–2003), and Denali (2015+) models. Verify your existing pump part number matches one of the replaced numbers listed above.

Q: Will this fit my Jacuzzi hot tub? A: Yes, this pump fits Jacuzzi J-200 and J-300 Series spas. Verify your existing pump part number before ordering.

Q: What voltage does this pump require? A: 115V / 60Hz. All electrical installation must be performed by a licensed electrician. Do not use on 230V circuits.

Q: Is the mounting bracket included? A: No. This is a baseless/bracketless (NF) pump. The universal mounting bracket (6000-532) is sold separately, or you can reuse your existing bracket.

Q: Is this the same as 6500-345? A: Yes. The 6500-345 has been discontinued and replaced by the 6500-845. They serve the same application. The current version may be approximately 2″ longer than some earlier models — verify physical fit.

Q: What size are the ports? A: Both suction and discharge are 2″ MBT (Male Buttress Thread). The outer diameter across the threads measures 3-1/16″ and connects to 2″ inner diameter plumbing.

Q: Can I use this as a single-speed pump? A: Yes. This 2-speed pump can replace the single-speed 6500-357 by connecting only the high-speed terminal and leaving low speed unconnected, using a 3-wire cord instead of a 4-wire cord.

Q: What pump cord do I need? A: The pump does not include a cord. Reuse your existing pump cord or purchase a compatible 115V 4-wire 2-speed pump cord. For 2-speed operation: Common (White), Low Speed (Black), High Speed (Red), Ground (Green).

Q: How do I know which direction to rotate the wet end? A: The wet end can be rotated left or right to match your existing plumbing layout. Rotate the wet end before tightening to align with your suction and discharge pipes.

Q: Does this replace the Emerson motor T55MWBLJ-962? A: Yes. The 6500-845 is the complete pump replacement (motor + wet end) for spas that previously used Emerson motors T55MWBLJ-962 and T55MWCNT-1432.

Q: What warranty is included? A: 1-year manufacturer warranty from Guangdong Lingxiao. Contact Parts4Tubs for full warranty terms.

Q: Do I need a GFCI breaker? A: Yes, GFCI protection is required by the National Electrical Code (NEC) for all hot tub and spa installations.

🏆 Why Choose the 6500-845

• ✅ OEM Sundance® / Jacuzzi® replacement — Factory-authorized part for guaranteed compatibility
• ✅ Powerful 1.5 HP output — Strong hydrotherapy massage performance at high speed
• ✅ Energy-efficient low speed — 3.8A draws minimal power during filtration cycles
• ✅ Flexible installation — Rotatable wet end and bracketless design adapt to existing plumbing
• ✅ Replaces 20+ part numbers — One pump covers a wide range of discontinued Sundance and Jacuzzi models
• ✅ Single or dual speed wiring — Versatile wiring options for different spa configurations
• ✅ Manufacturer warranty — 1-year factory warranty from Guangdong Lingxiao

🤝 Why Buy from Parts4Tubs

• ✅ US-based support for American customers
• ✅ Fast shipping across the United States
• ✅ Expert advice from spa and hot tub specialists
• ✅ Competitive pricing in USD
• ✅ Full warranty support
• ✅ Hassle-free returns
• ✅ Replacement seals, brackets, and cords available
• ✅ Dedicated customer service team

⭐ Summary

The 6500-845 is the current-production OEM Sundance® / Jacuzzi® TheraFlo replacement pump, built on the LX 48WUA1501C-II (NF) platform. Delivering 1.5 HP output with 2-speed operation at 115V/60Hz, it replaces over 20 discontinued part numbers including 6500-345, 6500-090, and 6500-758. Its baseless design with rotatable wet end ensures flexible installation across Sundance Solo, Caprio, Tango, and Denali models as well as Jacuzzi J-200 and J-300 Series spas. Backed by a 1-year manufacturer warranty — order today from Parts4Tubs for fast US shipping and expert compatibility support.

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	Magic Plastics Union 0602-15 (1.5″ Pump Union) | 1-1/2″S x 1-1/2″FBT Union, Pump, Magic, 1-1/2"S x 1-1/2"FBT (Industry Standard) w/ O-Ring	$6.36 Max: 568 Min: 1 Step: 1 Add to cart
	Magic Plastics Union 0602-20 (2″ Pump Union) | 2″S x 2″FBT w/ O-Ring Union, Pump, Magic, 2"S x 2"FBT (Industry Standard) w/ O-Ring	$8.00 Max: 486 Min: 1 Step: 1 Add to cart
	Waterway Union 400-6010 | 2-1/2″ Union Nut with 2-1/2″ Slip tailpiece and o-ring (2.5″ union) Union, Pump, Waterway, 2-1/2"FBT x 2-1/2"S	$14.77 Max: 160 Min: 1 Step: 1 Add to cart
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Hot Tub Pump Collar & Union Size Chart

Imperial & Metric Specifications

Union Size	Collar Size	Thread OD	Union OD	O-Ring Size
1.5" Female Buttress Thread (FBT)	2.5" / 64mm (Tip to Tip) Measurement	2-1/2" 64mm	2-13/16" 71mm	2-5/16" OD 59mm
2" Female Buttress Thread (FBT)	3.1" / 78mm (Tip to Tip) Measurement	3-1/16" 78mm	3-3/8" 81mm	2-15/16" OD 75mm
2.5" Female Buttress Thread (FBT)	3.6" / 91mm (Tip to Tip) Measurement	3-5/8" 91mm	4-1/4" 108mm	3-7/16" OD 87mm

Important Notes

The union "size" (1.5", 2", 2.5") is nominal and doesn't correspond to any actual measurement.

Collar size is measured from thread tip to thread tip on the pump outlet.

Most hot tub pumps use Female Buttress Thread (FBT) - 98% of applications.

O-ring gaskets may vary between manufacturers - measure your existing gasket for accuracy.

How do I Replace a Hot Tub Pump?

Here's a general step-by-step guide on how to replace a hot tub pump. Keep in mind that the specific steps may vary depending on your hot tub's make and model, so it's essential to consult your hot tub's manual for model-specific instructions. If you're not comfortable with this procedure, it's a good idea to seek professional assistance.

Materials You'll Need:

• Replacement pump
• Pipe wrench
• Adjustable wrench
• Screwdriver
• Pipe sealant (thread tape or plumber's putty)
• PVC primer and cement (if you have PVC plumbing)
• Teflon tape (for threaded connections)

Procedure:

1. Turn Off the Power: Before you begin, ensure the hot tub's power supply is turned off at the circuit breaker or disconnect switch. Safety should always be a priority when working with electrical components.

2. Drain the Hot Tub: If your hot tub is not already empty, you'll need to drain it. Follow your hot tub's manual or manufacturer's instructions for proper draining. (You might not need to do this if you can lock the pump off with the gate valves)

3. Locate the Pump: Identify the location of the existing pump in your hot tub. It's usually located near the equipment area or in a designated pump compartment.

4. Disconnect the Electrical Wiring: Carefully disconnect the electrical wiring from the old pump. This typically involves removing the electrical conduit cover, unscrewing wire nuts, and disconnecting the wires from the terminals. Be sure to note the wire connections or take a picture for reference when connecting the new pump.

5. Disconnect the Plumbing: Depending on your hot tub's plumbing setup, you'll need to disconnect the plumbing connections to the pump. Use a pipe wrench or adjustable wrench to loosen and remove the fittings. Be prepared for some water spillage when disconnecting the plumbing.

6. Remove the Old Pump: Once the electrical and plumbing connections are detached, carefully remove the old pump from its mounting position. Some pumps may be secured with mounting brackets or bolts.

7. Prepare the New Pump: If the new pump is not pre-assembled, you may need to attach fittings, unions, or adapters to match your hot tub's plumbing. Ensure that you use the appropriate sealant or Teflon tape on threaded connections to prevent leaks.

8. Mount the New Pump: Position the new pump in the same location as the old one and secure it in place using the mounting brackets or bolts.

9. Reconnect Plumbing: Reconnect the plumbing to the new pump, ensuring that all connections are tight and secure. If your hot tub uses PVC plumbing, use PVC primer and cement to bond the connections properly.

10. Reconnect Electrical Wiring: Reconnect the electrical wiring to the new pump, following the notes or pictures you took earlier. Make sure all wires are properly connected and secure.

11. Turn On the Power: Restore power to the hot tub by switching on the circuit breaker or reconnecting the disconnect switch.

12. Test the Pump: Turn on the hot tub's pump to ensure that it's working correctly. Check for any signs of leaks or irregularities in the plumbing connections.

13. Refill the Hot Tub: Once you've confirmed that the new pump is functioning properly, refill the hot tub with water.

14. Check for Leaks: Inspect the plumbing connections for any leaks. If you find any, turn off the pump, drain the tub again, and reseal the connections as needed.

15. Monitor: Keep an eye on the pump and plumbing for the next few days to ensure everything is functioning correctly and that there are no further issues.

Remember that this is a general guideline, and the specific steps may vary based on your hot tub's design. If you're unsure or uncomfortable with any aspect of this process, please do get in touch, happy to help.

How do I know what size hot tub pump I have?

Determining the size of your hot tub pump is an important step when it comes to maintenance or replacement. To find out the size of your hot tub pump, follow these steps:

1. Check the Manual: The easiest way to determine the size of your hot tub pump is to consult the owner's manual or user documentation that came with your hot tub. The manual typically contains detailed information about the specifications and components of your hot tub, including the pump.

2. Look at the Pump Housing: If you don't have access to the manual or it doesn't provide the information you need, inspect the pump itself. Most hot tub pumps have a label or plate on the pump housing that displays essential details, including the pump's model number, manufacturer, and specifications. You can then send that to me or Google it.

3. Measure the Pump: If the label is missing or damaged, you can measure the pump's dimensions. Measure the diameter of the pump's wet end (the part where the water flows) and the length of the wet end. These measurements can help identify the size and capacity of the pump.

4. Consult the Manufacturer: If you can't find the information on the pump or in the manual, contact the hot tub manufacturer or a reputable dealer. Provide them with your hot tub's model and serial number, and they should be able to identify the correct pump size for your specific hot tub.

5. Online Research: You can also search online using the pump's model number or hot tub's make and model. Many manufacturers provide detailed information about their products on their websites, and you may find specifications for your pump model.

Once you have determined the size and specifications of your hot tub pump, you can proceed with maintenance, repairs, or replacement if necessary. Keep in mind that replacing a hot tub pump with the same size and capacity as the original is crucial to ensure proper water circulation and filtration in your hot tub. If you're unsure about any aspect of this process, get in touch, always happy to help.