1. Product Overview
The LINGXIAO 48WUA1001C-II SPA Pump is a high-performance, two-speed motor designed for hot tubs and spas. It offers reliable operation and is engineered for compatibility with various OEM models, providing an efficient replacement solution.
1.1. Key Features
- Model Compatibility: Designed to be identical to original SPA factory pumps for perfect compatibility.
- Two-Speed Operation: Features a low speed (0.35HP, 3.8A) for continuous filtration and a high speed (1.5HP, 10.3A) for powerful jet action.
- Durable Motor: Equipped with a pure copper winding motor, 80,000 capacitor charge-discharge cycle tested, and a thermal protector from Texas Instruments for long service life.
- Quiet Operation: Incorporates Anti-Creep Bearings for reduced noise during operation.
- Certifications: UL, CUL, ETL certified for safety and quality.
- Easy Plumbing: Connects to 2-inch plumbing and includes a free set of 2-inch unions for quick installation.
1.2. Product Components
The LINGXIAO SPA Pump consists of the main pump body, the motor housing, and connection unions. The pump is designed for easy integration into existing spa systems.

Figure 1: LINGXIAO 2 Speed Hot Tub SPA Pump (Model: 48WUA1001C-II) with included unions.
2. Setup and Installation
2.1. Safety Precautions
- Always turn off the power to the hot tub at the circuit breaker before beginning any installation or maintenance.
- Ensure the hot tub is drained before disconnecting the old pump.
- Consult a qualified electrician if you are unsure about electrical wiring.
- Wear appropriate personal protective equipment (PPE) during installation.
2.2. Pre-Installation Checks
Before installing, verify that the new pump's specifications match your existing system. This model operates at 115V/60Hz. Confirm that your hot tub's plumbing and electrical connections are compatible.
2.3. Adjusting Discharge Location
The pump's discharge can be adjusted to one of three locations (12 o'clock, 3 o'clock, 9 o'clock) to fit your plumbing configuration. The factory default is 12 o'clock. To adjust, loosen the four indicated screws on the pump housing, rotate the wet end to the desired position, and then securely tighten the screws.

Figure 2: Adjusting the pump's discharge location.
Video 1: Visual guide on adjusting the pump's discharge location and general features.
2.4. Plumbing Connection
Connect the pump to your hot tub's 2-inch plumbing using the provided unions. Ensure all connections are tight and leak-free. It is recommended to use plumbing sealant for a secure fit.
Figure 3: Plumbing connection with 2-inch unions.
2.5. Electrical Wiring
This pump is a two-speed model designed for 115V/60Hz circuits. Proper wiring is critical for safe and correct operation. Refer to the diagram below and the instructional video for detailed wiring steps.
- Turn off power first.
- Ensure the corresponding voltage of the circuit (115V/60Hz).
- Connect the Red wire (High speed) to terminal H.
- Connect the White wire (Neutral wire) to terminal C.
- Connect the Black wire (Low speed) to terminal L.
- Connect the Green wire (Ground wire) to the terminal Ground.

Figure 4: 115V Two-Speed Wiring Diagram.
Video 2: Comprehensive guide on wiring the LINGXIAO 48WUA series SPA pump for two-speed operation.
3. Operation
3.1. Initial Startup
After successful installation and wiring, fill your hot tub with water. Ensure all valves are open and there are no airlocks in the system. Turn on the power to the hot tub. The pump should prime itself and begin circulating water.
3.2. Two-Speed Functionality
This pump offers two operational speeds:
- Low Speed: Ideal for continuous filtration and heating, drawing approximately 3.8 Amps and providing 0.35 HP.
- High Speed: Provides maximum power for jets and hydrotherapy, drawing approximately 10.3 Amps and delivering 1.5 HP.
Switch between speeds using your hot tub's control panel.
3.3. Flow Rate
The pump is capable of delivering a maximum flow rate of 122 Gallons Per Minute (GPM) at high speed and a minimum flow rate of 53 GPM at low speed, ensuring efficient water circulation and powerful jet performance.
Figure 5: Pump Flow Rates.
4. Maintenance
4.1. Regular Checks
- Periodically inspect the pump for any signs of leaks around the unions or pump seals.
- Listen for unusual noises during operation, which could indicate a bearing issue or debris in the wet end.
- Ensure the motor's cooling fan is free from obstructions to prevent overheating.
4.2. Cleaning
Keep the exterior of the pump clean and free of dust and debris. Do not spray water directly onto the motor or electrical components.
4.3. Winterization
In climates where temperatures drop below freezing, it is essential to properly winterize your hot tub and pump to prevent freeze damage. This typically involves draining the pump and plumbing lines completely.
5. Troubleshooting
This section provides solutions to common issues you might encounter with your SPA pump.
5.1. Common Issues
- Pump Not Starting:
- Check if the circuit breaker has tripped.
- Verify all electrical connections are secure and correctly wired (refer to Section 2.5).
- Ensure the hot tub's control panel is sending power to the pump.
- Low Pressure or No Water Flow:
- Check for airlocks in the plumbing system; try bleeding air from the pump or jets.
- Inspect the hot tub filter for clogs and clean or replace if necessary.
- Ensure all valves in the plumbing system are fully open.
- Check for debris or obstructions in the pump's wet end or impeller.
- Excessive Noise:
- A loud grinding or squealing noise may indicate worn bearings.
- Vibration can be caused by loose mounting bolts; ensure the pump is securely fastened.
- Air cavitation (sucking air) can cause noise; check water level and ensure no air leaks in the suction line.
5.2. Contact Support
If you encounter issues that cannot be resolved using the troubleshooting steps above, please contact LINGXIAO PUMP Support through Amazon 'Ask a question'. Our technical support team is available to assist you within 24 hours.
6. Technical Specifications
| Specification | Detail |
|---|---|
| Brand | LINGXIAO |
| Model | 48WUA1001C-II |
| Voltage | 115 Volts (AC) |
| Power (High Speed) | 1.5 HP |
| Power (Low Speed) | 0.35 HP |
| Amperage (High Speed) | 10.3A |
| Amperage (Low Speed) | 3.8A |
| Maximum Flow Rate | 122 Gallons Per Minute |
| Minimum Flow Rate | 53 Gallons Per Minute |
| Product Dimensions | 8"L x 13"W x 8"H |
| Item Weight | 26 Pounds |
| Material | Coiling iron |
| Manufacturer | LX |
7. Warranty and Support
7.1. Warranty Information
The LINGXIAO 48WUA1001C-II SPA Pump comes with a 1-Year Warranty from the date of purchase. This warranty covers manufacturing defects and ensures the product meets its specified performance standards under normal use.
7.2. Customer Support
For any questions, technical assistance, or warranty claims, please do not hesitate to contact LINGXIAO PUMP Support. You can reach us through the 'Ask a question' feature on Amazon. We are committed to providing prompt and helpful support within 24 hours to resolve any issues you may encounter.





