🔧 LX Lingxiao 48WUA 1.65 HP Spa Pump (48WUA1653C-I) – Single-Speed Dual-Voltage 48 Frame Jet Pump

Versatile 115V/230V Convertible Power — Direct Replacement for Aqua-Flo XP2e and Watkins Wavemaster Spas

📋 Product Overview

The LX 48WUA1653C-I is a 1.65 HP single-speed jet pump manufactured by Guangdong Lingxiao Pump Industry Co., Ltd. (LX). This WUA series pump features dual-voltage capability, operating on either 115V or 230V at 60Hz, making it one of the most versatile replacement pumps available for the North American spa market. The pump ships factory-wired for 230V operation, with simple terminal reconfiguration available for 115V use.

Designed as a direct replacement for the Aqua-Flo Flo-Master XP2e 2.0 HP pump, this LX model also serves as a widely used aftermarket replacement for the Watkins Wavemaster 7000 (part numbers 71699, 36675-03, and 0974101-03) found in Hot Spring, Tiger River, Caldera, Solana, and Hot Spot spas. Both the suction and discharge ports are 2″ Male Buttress Thread (MBT), with center suction and side discharge configuration. The volute can be rotated in 90-degree increments for flexible plumbing installation.

At 115V, this pump draws 17.0 amps; at 230V, it draws 8.5 amps. The compact 48-frame thru-bolt motor features pure copper windings for cooler, quieter operation and includes a Texas Instruments thermal protector for automatic overheat safety. The Viton/Silicon Carbide/Graphite mechanical seal ensures long-lasting, leak-free performance even under continuous duty operation.

⭐ Key Features

✅ 1.65 HP Single-Speed Motor — Delivers strong, consistent jet power for hydrotherapy massage

✅ Dual-Voltage 115V / 230V Convertible — Factory-wired for 230V with simple terminal reconfiguration for 115V operation

✅ 48 Frame Thru-Bolt Design — Compact motor footprint for tight spa equipment compartments

✅ Viton / Silicon Carbide / Graphite Mechanical Seal — Resistant to extreme temperatures and chemical corrosion for durable, leak-free performance

✅ 2″ MBT Connections (Center Suction / Side Discharge) — Industry-standard 2″ Male Buttress Thread ports (approximately 3-1/16″ across threads)

✅ Rotatable Volute — Discharge can be rotated every 90 degrees (12, 3, 6, or 9 o’clock positions)

✅ Pure Copper Winding Motor — Runs cooler and quieter for extended service life

✅ Thermal Protector from Texas Instruments — Auto-reset motor overheat protection for continuous safe operation

✅ Anti-Creep Bearings — High-temperature grease-lubricated bearings ensure whisper-quiet operation

✅ Includes Two 2″ Pump Unions — Ships with union fittings for convenient plumbing connection

✅ UL, cUL, and ETL Certified — Meets North American safety standards

⚙️ Technical Specifications

Specification	Value
Pump Type	Jet Pump (Single-Speed)
Manufacturer	Guangdong Lingxiao Pump Industry Co., Ltd. (LX)
Pump Series	WUA (48WUA)
Part Number	48WUA1653C-I
Horsepower (Output)	1.65 HP
Speed Settings	Single-Speed (1-Speed)
Voltage	115V / 230V Convertible (factory-wired for 230V)
Frequency	60 Hz
Amperage at 115V	17.0 A
Amperage at 230V	8.5 A
Motor Frame	48 Frame Thru-Bolt
Suction Port Size	2″ MBT (Male Buttress Thread)
Suction Port Position	Center (front face)
Discharge Port Size	2″ MBT (Male Buttress Thread)
Discharge Port Position	Side (rotatable in 90° increments)
Thread Outside Diameter	Approximately 3-1/16″ (78mm) across threads
Dimensions (L × W × H)	15-3/16″ × 8-7/16″ × 8-7/16″
Weight	Approximately 33 lbs (shipping weight)
Seal Type	Viton / Silicon Carbide / Graphite mechanical seal
Motor Insulation	Class F
Motor Protection	IPX5
Duty Rating	Continuous Duty
Unions Included	Yes — two 2″ pump unions included
Power Cord Included	No — cord sold separately
Certifications	UL, cUL, ETL
Warranty	1 Year Manufacturer Warranty

⚡ Electrical Requirements

Electrical Spec	115V Configuration	230V Configuration
Supply Voltage	115V (110V–120V range)	230V (220V–240V range)
Frequency	60 Hz	60 Hz
Phase	Single Phase	Single Phase
Full Load Amps	17.0 A	8.5 A
Factory Wiring	Must reconfigure terminals	Factory default

Voltage Conversion Wiring Guide

This pump ships factory-wired for 230V. To convert to 115V, the motor terminal connections must be changed:

230V/60Hz Wiring (Factory Default):

• Terminal 1 — White Cable (Neutral)
• Terminal 2 — Blue Cable
• Terminal 3 — Black Cable (Line/Hot)
• Terminal 6 — Brown Cable
• Ground Cable — Grounding terminal

115V/60Hz Wiring (Reconfigured):

• Terminal 1 — White Cable (Neutral) AND Blue Cable (together)
• Terminal 2 — Brown Cable
• Terminal 3 — Black Cable (Line/Hot)
• Ground Cable — Grounding terminal

⚠️ IMPORTANT ELECTRICAL SAFETY NOTICES:

• All electrical work must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and local building codes.
• Hot tubs and spas require GFCI (Ground Fault Circuit Interrupter) protection as mandated by NEC.
• A dedicated circuit is required — do not share with other appliances.
• Verify your spa’s voltage before ordering and before connecting. Using the wrong voltage configuration will damage the motor and void the warranty.
• At 115V, this pump draws 17.0 amps. Ensure your circuit and spa pack can handle this amperage, especially in plug-and-play (115V wall plug) applications where the combined amp draw of pump plus heater may exceed circuit capacity.
• The pump cord is NOT included. Reuse your existing pump cord or purchase a compatible replacement.

🔄 Compatibility Guide

Port & Frame Specifications

Specification	This Pump — 48WUA1653C-I
Frame Type	48 Frame Thru-Bolt
Suction	2″ MBT — Center (front face)
Discharge	2″ MBT — Side (rotatable 90° increments)
Thread OD	~3-1/16″ (78mm) across threads
Union Size Needed	2″ Female Buttress Thread (FBT)

Compatible Accessories (Sold Separately from Parts4Tubs)

Part #	Description
Magic Plastics 0602-20	2″S × 2″ FBT Pump Union with O-Ring
Waterway 400-6010	2-1/2″ Union Nut with 2-1/2″ Slip Tailpiece and O-Ring
21086	1-Speed Pump/Blower AMP Cord, 14/3, 4-Pin, 5′ Cord

Replaces / Cross-Reference Part Numbers

This pump directly replaces the following models. Always verify amperage, voltage configuration, frame size, and port dimensions before ordering:

Watkins / Hot Spring / Tiger River OEM Part Numbers:

• 71699 (Wavemaster 7000, Version 3)
• 36675-03 (Vendor Code 3536 — LX pump)
• 36675 (Wavemaster 6000/7000)
• 0974101-03 (Watkins)
• 0974101 (Watkins)
• 06115734-1 (Vendor Code 4081)
• 1431701-01 (Watkins)
• 36745 (Watkins)
• 39583 (Watkins)

Aqua-Flo / Gecko Replacement:

• Aqua-Flo Flo-Master XP2e 2.0 HP, 115/230V, 48 Frame, 1-Speed, 2″ inlet/discharge

LX Alternate Model Reference:

• 48WUA1653C-I (this pump — with base/feet)

⚠️ Note: The Watkins Wavemaster 7000 was supplied by multiple vendors over the years (Vendor Codes 0108, 0302, 3536, 4081, and others). The LX 48WUA1653C-I corresponds to Vendor Code 3536. While it functions identically to other vendor versions, minor wet end differences may exist. If your original pump has a different vendor code, verify compatibility or contact Parts4Tubs for assistance.

Known Compatible Spa Brands & Models

Hot Spring Spas (by Watkins):

• Classic (1993–1999)
• Grandee (1993–1999) — 230V version required for some models
• Sovereign (1993–1999)
• Prodigy (1997–1999)
• Jetsetter (1997–1999)
• Landmark (1998–2003) — 230V version required for some models
• Vanguard HP (2001+) — 230V version required for some models

Tiger River Spas (by Watkins):

• Bengal (1997–2004)
• Sumatran (1997–2004)
• Siberian (2000–2002) — 230V version required

Other Compatible Brands:

• Caldera Spas (select models using Wavemaster 7000)
• Solana Spas (select models)
• Hot Spot Spas (select models)
• Any spa using Aqua-Flo XP2e 2.0 HP 115/230V 48-frame single-speed pump with 2″ plumbing

⚠️ Always verify frame size (48 frame), plumbing connections (2″ MBT), amperage (17.0A at 115V or 8.5A at 230V), and voltage match your existing pump before ordering.

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🛠️ Installation Requirements

Mounting

Requirement	Specification
Mounting Position	Horizontal
Base Type	Includes feet/base for direct mounting
Motor Ventilation	Ensure adequate airflow around motor — do not block motor vents
Service Access	Allow sufficient clearance for maintenance and seal/capacitor replacement

Plumbing Connections

Connection	Size	Type
Suction (Intake)	2″	Male Buttress Thread (MBT) — Center face
Discharge (Output)	2″	Male Buttress Thread (MBT) — Side
Unions Included	Yes	Two 2″ pump unions shipped with pump

Discharge Rotation

The volute can be rotated in 90-degree increments to position the discharge at 12, 3, 6, or 9 o’clock. The pump ships with discharge at the 12 o’clock (top) position. To rotate, loosen the thru-bolts, reposition the wet end, and retighten evenly.

Installation Notes

⚠️ Pump ships factory-wired for 230V. Verify your spa’s voltage before connecting. Reconfigure terminals for 115V operation as described in the Electrical Requirements section.

⚠️ Pump must be installed below water level (flooded suction) for proper operation.

⚠️ Never run the pump dry — this causes immediate seal damage and voids the warranty.

⚠️ Ensure proper grounding and bonding per NEC requirements.

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

⚠️ Power cord is NOT included — reuse your existing pump cord or purchase a compatible replacement.

⚠️ Motor capacitor placement (single or dual, top or side mount) may vary between production runs. Ensure sufficient clearance in the pump compartment for possible dual-capacitor motor configurations.

⚠️ When replacing a Watkins Wavemaster 7000, the pump base (stand) may need to be swapped with the base from your original pump if your compression fittings do not align in height with the new pump’s ports.

⚠️ Use the included unions for the best seal. Unions from different manufacturers may vary slightly in fit.

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🔩 Maintenance Guide

Routine Maintenance

Task	Frequency	Notes
Check for leaks	Monthly	Inspect around seal area and union connections
Inspect union connections	Monthly	Tighten if needed; check O-rings for wear
Clean strainer/filter	As needed	Remove debris to maintain proper flow
Check motor amperage	Annually	Should match rated values (17.0A at 115V or 8.5A at 230V)
Inspect motor vents	Quarterly	Keep clear of debris for proper cooling
Check mounting bolts/base	Quarterly	Ensure pump is secure, no excessive vibration

Warning Signs — Replace Pump If:

• Unusual noise such as grinding, screeching, or humming without rotation
• Water leaking from the seal area
• Motor repeatedly trips the circuit breaker
• Reduced water flow or jet pressure
• Motor overheating or automatic shutoff activating frequently
• Visible corrosion or damage to the wet end

Seal Replacement

Component	Specification
Seal Type	Viton / Silicon Carbide / Graphite mechanical seal

⚠️ Replace the seal at the first sign of leakage to prevent further damage to the motor.

⚠️ If the motor has difficulty starting or hums without rotating, the start capacitor may need replacement. Consult a qualified technician.

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🎯 Ideal Applications

Application	Suitability	Notes
♨️ Watkins / Hot Spring replacement	✅ Yes — Primary use	Direct replacement for Wavemaster 7000 (71699, 36675-03)
♨️ Tiger River spa replacement	✅ Yes — Primary use	Bengal, Sumatran, Siberian models
♨️ Aqua-Flo XP2e replacement	✅ Yes	Replaces XP2e 2.0 HP 115/230V 48-frame single-speed pumps
♨️ Hot tub jet pump (230V)	✅ Yes	Low amperage draw (8.5A) at 230V — ideal for dedicated circuit spas
♨️ Hot tub jet pump (115V)	⚠️ Verify amperage	17.0A draw at 115V — may exceed capacity for plug-and-play configurations
🛁 Whirlpool bath	⚠️ Verify	Requires compatible voltage and 2″ plumbing

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❓ Frequently Asked Questions

Q: What horsepower is this pump? A: This pump is rated at 1.65 HP output power. Some retailers may list a higher input HP value. When comparing replacement pumps, always match by amperage (17.0A at 115V or 8.5A at 230V) rather than stated horsepower, as HP rating methods vary between manufacturers.

Q: Is this pump 115V or 230V? A: This pump is dual-voltage, capable of operating on either 115V or 230V at 60Hz. It ships factory-wired for 230V. To use on 115V, the motor terminal connections must be reconfigured. A licensed electrician should perform this conversion. Always verify your spa’s voltage before ordering and connecting.

Q: Will this fit my Hot Spring or Tiger River spa? A: This pump is a direct replacement for the Watkins Wavemaster 7000 (part numbers 71699, 36675-03, 0974101-03). It fits Hot Spring Classic, Grandee, Sovereign, Prodigy, Jetsetter models (1993–1999), Landmark (1998–2003), and Tiger River Bengal, Sumatran, Siberian models. Verify your existing pump’s voltage, amperage, frame size, and port size before ordering.

Q: Does this replace the Aqua-Flo XP2e? A: Yes — this LX pump is commonly used to replace Aqua-Flo Flo-Master XP2e 2.0 HP 115/230V 48-frame single-speed pumps with 2″ inlet and discharge.

Q: What size are the ports? A: Both suction and discharge use 2″ Male Buttress Thread (MBT), which measures approximately 3-1/16″ (78mm) across the outside of the threads. The suction is on the center front face, and the discharge is on the side.

Q: Can I use this in a plug-and-play (115V wall plug) hot tub? A: Use caution. At 115V, this pump draws 17.0 amps. In plug-and-play spas that run on a standard 115V household circuit (typically 15A or 20A), this pump may draw too much amperage to operate simultaneously with the heater. Always verify that your circuit can handle the total amp draw before installing.

Q: Does a power cord come with this pump? A: No — the power cord is sold separately. Reuse your existing pump cord if compatible. For single-speed applications, the 21086 AMP connector cord (14/3, 4-Pin, 5′ cord) is a common replacement option.

Q: Does this include pump unions? A: Yes — two 2″ pump unions are included with this pump. LX recommends using the included unions for the best seal.

Q: Can I rotate the discharge direction? A: Yes. The volute can be rotated in 90-degree increments (12, 3, 6, or 9 o’clock positions). The pump ships with discharge at the 12 o’clock (top) position.

Q: What is the difference between this pump (48WUA1653C-I) and the 48WUA1501C-II? A: The 48WUA1653C-I is a 1.65 HP single-speed pump with dual-voltage (115V/230V) capability, drawing 17.0A at 115V. The 48WUA1501C-II is a 1.5 HP dual-speed pump that operates only on 115V, drawing 13.8A/3.8A. Choose based on your existing pump’s specifications — always match voltage, speed, and amperage.

Q: Why does the pump ship wired for 230V? A: LX ships this pump factory-wired for 230V as the default configuration. Most spa applications that use this pump operate on 230V dedicated circuits. If your spa operates on 115V, a licensed electrician can reconfigure the motor terminals per the wiring guide included with the pump.

Q: What warranty is included? A: This pump includes a 1-year manufacturer warranty. The motor serial number label (located on the exterior of the motor housing) is required for all warranty claims. Contact Parts4Tubs for full warranty terms.

Q: How do I know if my pump needs replacing? A: Common signs include unusual noise (grinding, screeching, humming without rotation), water leaking from the seal area, reduced jet flow, the motor repeatedly tripping the circuit breaker, or the motor overheating.

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

🏆 Why Choose the LX 48WUA1653C-I

✅ Dual-Voltage Versatility — Operates on either 115V or 230V, fitting the widest range of spa installations

✅ Proven Wavemaster Replacement — Direct fit for Watkins Hot Spring, Tiger River, Caldera, and Solana spas

✅ Powerful 1.65 HP Output — Strong, consistent single-speed jet performance for hydrotherapy massage

✅ Whisper-Quiet Design — Pure copper windings and anti-creep bearings minimize noise and vibration

✅ Durable Viton/Silicon Carbide/Graphite Seal — Resists extreme temperatures and chemical corrosion for long service life

✅ Flexible Installation — Rotatable volute fits virtually any spa cabinet plumbing configuration

✅ Unions Included — Ships with two 2″ pump unions for faster installation

✅ UL, cUL, and ETL Certified — Tested and approved to North American safety standards

✅ Texas Instruments Thermal Protector — Auto-reset overheat protection for continuous safe operation

🤝 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

✅ Full warranty support

✅ Hassle-free returns

✅ Replacement seals, cords, unions, and parts available

✅ Dedicated customer service team

✨ Summary

The LX 48WUA1653C-I is a 1.65 HP single-speed jet pump from Lingxiao with dual-voltage 115V/230V convertible operation (17.0A/8.5A), a compact 48-frame thru-bolt motor, and 2″ MBT center suction with side discharge. Featuring Viton/Silicon Carbide/Graphite mechanical seals, a rotatable volute, and UL/cUL/ETL certification, this pump is the go-to replacement for Watkins Wavemaster 7000 pumps in Hot Spring, Tiger River, Caldera, and Solana spas, as well as Aqua-Flo XP2e 2.0 HP pumps. Includes two pump unions. A reliable, quiet, and versatile choice for spa owners needing a proven dual-voltage single-speed replacement jet pump.

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.