Product Overview
The Wayne CWS100 1-horsepower shallow well jet pump is designed for wells up to 90-feet deep. It is capable of pumping up to 560 gallons per hour at a 5-foot depth when operating at 50 PSI. This pump is built with a durable cast iron volute and features a dedicated priming port for easy filling.

Image: The Wayne CWS100 Convertible Well Pump, showcasing its black cast iron body and motor assembly.
Key Features
- Power and Flow: 1 HP motor with a maximum flow rate of 588 gallons per hour at 50 PSI.
- Connections: Features a 3/4 inch NPT discharge, 1-1/4 inch NPT suction, and 1 inch drive.
- Voltage: Dual voltage (120V/240V) high-efficiency square flange motor, factory-set for 240V.
- Automatic Operation: Pressure switch pre-set at 30-50 PSI for reliable automatic operation.
- Construction: Durable cast iron volute with a dedicated priming port for easy initial setup.
- Origin: Assembled in the US with foreign and domestic parts.
Setup Instructions
Proper installation is crucial for the optimal performance and longevity of your Wayne CWS100 pump. Ensure all local plumbing and electrical codes are followed. The pump is designed for shallow well applications up to 90 feet deep.
1. Site Selection and Mounting
Choose a dry, well-ventilated location as close to the well as possible. Mount the pump on a solid, level surface to minimize vibration and noise. Use appropriate bolts to secure the pump base.
2. Plumbing Connections
Connect the suction line (1-1/4 inch NPT) from the well to the pump's suction port. Connect the discharge line (3/4 inch NPT) from the pump to your household plumbing system. Ensure all connections are watertight using thread sealant. Consider increasing suction plumbing diameter or decreasing pipe friction for improved performance.
3. Electrical Wiring
The pump is factory-set for 240V operation. If 120V operation is desired, consult the wiring diagram provided in the full user manual for proper conversion. Connect the pump to a dedicated, properly grounded electrical circuit with appropriate overcurrent protection. All electrical work should be performed by a qualified electrician.
4. Priming the Pump
Before initial operation, the pump must be primed. Remove the priming plug from the dedicated priming port on the volute. Fill the pump casing and suction line completely with water until it overflows. Replace the priming plug securely. This step is critical for jet pump operation.
Operating Instructions
Once properly installed and primed, the Wayne CWS100 pump operates automatically based on system pressure.
1. Initial Start-up
After priming, restore power to the pump. The pump will start and build pressure. The pressure switch is pre-set to turn the pump on at 30 PSI and off at 50 PSI. Allow the pump to run until it reaches the cut-off pressure and shuts off automatically.
2. Normal Operation
The pump will cycle on and off as water is used and system pressure drops below the cut-in setting. Ensure there are no leaks in the plumbing system, as this can cause the pump to short cycle (turn on and off frequently).
3. Shutting Down
For temporary shutdown, simply turn off the power to the pump at the circuit breaker. For extended periods of non-use, especially in freezing temperatures, drain the pump and plumbing lines completely to prevent damage.
Maintenance
Regular maintenance helps ensure the longevity and efficient operation of your well pump.
- Inspect for Leaks: Periodically check all plumbing connections for leaks. Even small leaks can affect pump performance.
- Check Pressure Switch: Ensure the pressure switch is clean and free from debris. Do not attempt to adjust the factory-set pressure unless you are a qualified technician.
- Winterization: In areas subject to freezing temperatures, drain the pump and all exposed plumbing lines completely before winter. This prevents damage from ice expansion.
- Motor Ventilation: Ensure the motor's ventilation openings are clear of obstructions to prevent overheating.
Troubleshooting
This section provides basic troubleshooting steps for common issues. For more complex problems, consult a qualified professional or refer to the complete user manual.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump runs but no water or low pressure | Loss of prime, air leak in suction line, low well water level, clogged impeller. | Re-prime the pump. Check all suction line connections for leaks. Verify well water level. Inspect and clean impeller if accessible. |
| Pump short cycles (turns on/off frequently) | Waterlogged pressure tank, air leak in system, pressure switch malfunction. | Check pressure tank air charge. Inspect plumbing for leaks. Consult a technician for pressure switch issues. |
| Pump does not start | No power, tripped circuit breaker, faulty motor, seized pump. | Check power supply and circuit breaker. Consult a qualified electrician or pump technician. |
Specifications
| Attribute | Detail |
|---|---|
| Brand | Wayne |
| Model Number | CWS100 |
| Horsepower | 1 HP |
| Max Flow Rate | 588 gallons per hour (at 50 PSI) |
| Max Lifting Height | Up to 90 feet |
| Voltage | 120V/240V (Dual Voltage, factory set for 240V) |
| Discharge Size | 3/4 inch NPT |
| Suction Size | 1-1/4 inch NPT |
| Drive Size | 1 inch |
| Pressure Switch Setting | 30-50 PSI (pre-set) |
| Material | Cast Iron |
| Item Weight | 40 Pounds |
| Product Dimensions | 14 x 9 x 8.75 inches |
| UPC | 040066105974 |
Warranty Information
The Wayne CWS100 Convertible Well Pump comes with a 3-Year limited warranty covering parts only. For specific terms and conditions, please refer to the official warranty documentation included with your product or contact Wayne customer support.
Support and Further Information
For detailed diagrams, advanced troubleshooting, or to purchase replacement parts, please refer to the complete user manual available as a PDF document. You can often find this on the manufacturer's official website or through the retailer where you purchased the product.
For direct support, you may visit the official Wayne store or contact their customer service department.
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A PDF version of the user manual is also available for download: Download User Manual (PDF)





