1. Introduction
This manual provides essential instructions for the safe and efficient installation, operation, and maintenance of your Diversitech CP-16 Condensate Pump. Please read this manual thoroughly before using the product and retain it for future reference.
The Diversitech CP-16 is a compact, 120V condensate pump designed for automatically evacuating condensate or water discharge from HVAC/R equipment. It features a 16-foot vertical lift capability, a built-in overflow switch for system protection, and a removable check valve for easy cleaning.
2. Safety Information
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- Always disconnect power before installing or servicing the pump.
- Ensure proper electrical grounding to prevent electric shock.
- Do not operate the pump dry.
- Install the pump in an accessible location for maintenance.
- Use only with water or condensate. Do not pump flammable liquids or chemicals.
3. Product Overview
3.1 Key Features
- Durable construction for long-lasting performance.
- Model Number: CP-16.
- Compact design: 12" L x 7" W x 5" H.
- Lightweight: Approximately 4.41 lbs (2 kg).
- Automatic condensate removal.
- Built-in overflow switch for system shutdown.
- Removable check valve to prevent backflow and simplify cleaning.
- Four inlet holes for versatile placement.
- 16-foot maximum vertical lift.
- 120V electrical operation.
3.2 What's in the Box
- 1 x Diversitech CP-16 Condensate Pump
3.3 Product Visuals


4. Specifications
| Feature | Value |
|---|---|
| Model Number | CP-16 |
| Brand | Diversitech |
| Product Dimensions | 5"L x 12"W x 7"H |
| Item Weight | 4.41 Pounds (2 Kilograms) |
| Material | Plastic |
| Color | Black |
| Power Source | 120V AC |
| Voltage | 120 Volts |
| Maximum Flow Rate | 1.2 Gallons Per Minute |
| Maximum Lifting Height | 16 Feet |
5. Setup
5.1 Placement
Position the pump on a level surface near the HVAC/R unit. The pump features plastic hang tabs and four inlet holes for flexible installation. Ensure the pump is easily accessible for future maintenance.
5.2 Condensate Inlet Connection
- Connect the condensate drain line from your HVAC/R equipment to one of the pump's inlet holes.
- Ensure a secure and watertight connection to prevent leaks.
- The pump is designed to accept standard condensate drain tubing.
5.3 Discharge Line Connection
- Connect a suitable discharge tube to the pump's outlet. The pump includes a removable check valve to prevent backflow.
- Route the discharge line to an appropriate drain point, ensuring it is free of kinks or obstructions.
- The pump can lift condensate up to 16 feet vertically. Plan your discharge route accordingly.
5.4 Electrical Connection
- Connect the pump to a dedicated 120V AC power supply.
- Ensure the electrical connection complies with all local codes and regulations.
- The pump's built-in overflow switch should be wired to shut down the HVAC/R system in case of a pump malfunction or high water level, preventing potential water damage. Consult a qualified electrician if unsure about wiring the overflow switch.
6. Operating Instructions
The Diversitech CP-16 Condensate Pump operates automatically. When condensate water fills the reservoir to a predetermined level, the pump will activate, discharge the water, and then shut off once the water level drops.
- Automatic Operation: The pump is designed for continuous, automatic operation. No manual intervention is typically required during normal use.
- Overflow Protection: The integrated overflow switch is a safety feature. If the water level in the pump's reservoir rises above the normal operating level (e.g., due to a clog or pump failure), the switch will activate, interrupting power to the HVAC/R system to prevent an overflow. If this occurs, investigate the cause of the high water level immediately.
6.1 Video Overview
7. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your condensate pump.
7.1 Cleaning the Reservoir
- Disconnect power to the pump and the HVAC/R unit.
- Disconnect the inlet and outlet tubing.
- Remove the pump cover and carefully lift out the motor assembly.
- Clean the inside of the reservoir with warm, soapy water and a soft brush to remove any sludge, algae, or debris. Rinse thoroughly.
- Clean the float switch mechanism to ensure it moves freely.
- Reassemble the pump, ensuring all connections are secure.
7.2 Inspecting the Check Valve
The removable check valve prevents water from flowing back into the pump. Periodically inspect it for debris or signs of wear. Clean or replace if necessary.
7.3 General Inspection
- Check all tubing for cracks, leaks, or blockages.
- Ensure electrical connections are tight and free from corrosion.
- Verify the pump is sitting level and securely.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump not running | No power; Clogged inlet/outlet; Stuck float switch; Motor failure | Check power supply; Clear blockages; Clean/free float switch; Contact support for replacement |
| Water overflowing | Clogged discharge line; Pump failure; Overflow switch not wired correctly | Clear discharge line; Check pump operation; Verify overflow switch wiring |
| Pump runs continuously | Leaking check valve; Stuck float switch; Insufficient water to trigger off | Inspect/replace check valve; Clean/free float switch; Ensure proper condensate flow |
| Excessive noise | Debris in impeller; Loose mounting; Air in system | Clean impeller; Secure pump mounting; Bleed air from system if applicable |
9. Warranty and Support
For specific warranty information, please refer to the documentation included with your product or visit the official Diversitech website.
Diversitech is committed to providing high-quality products and exceptional customer support. If you encounter any issues or have questions regarding your CP-16 Condensate Pump, please contact Diversitech customer service.
You can find more information and contact details on the Diversitech Store on Amazon.
10. Manufacturer Information
DiversiTech Corporation is a leading manufacturer and supplier of components and related products for multiple industries, including HVAC/R. Founded in 1971, Diversitech is known for its innovative and advanced products designed to save time on installations.







