Introduction
The PONDMASTER AP-40 SUPREME AIR PUMP is designed to provide reliable aeration for ponds, water gardens, and aquariums. This continuous duty pump efficiently adds oxygen to water, which is crucial for the health of aquatic life, including fish and plants. It also aids in water circulation and can help maintain an open area in surface ice during winter, allowing harmful gases to escape.
Key features include an energy-efficient 110V motor, quiet operation, and a design for continuous use without the need for lubrication. The pump is capable of aerating ponds up to 5,000 gallons and 10 feet deep.
Safety Information
- Always disconnect the pump from the power supply before performing any maintenance or handling.
- Ensure the pump is placed in a dry, well-ventilated area. For outdoor applications, it is strongly recommended that the compressor be enclosed to protect it from environmental elements such as rain and direct sunlight.
- Do not operate the pump if the power cord is damaged.
- This pump is designed for aeration purposes only. Do not use it for any other unintended applications.
- Keep out of reach of children.
Package Contents
Upon unpacking, please verify that all components are present:
- PONDMASTER AP-40 SUPREME AIR PUMP unit
- Non-weighted air manifold diffuser
- 6-foot grounded power cord (attached to unit)
Note: Air tubing is sold separately and is required for operation.
Setup
- Placement: Position the air pump in a location that is dry, well-ventilated, and protected from direct weather exposure. If used outdoors, an enclosure is recommended to shield the unit from rain and sun. Ensure the pump is placed above the water level to prevent back-siphoning.
- Connect Air Tubing: Attach appropriate air tubing (not included) to the outlet nozzle of the pump. Secure the connection to prevent air leaks.
- Connect Diffuser: Connect the other end of the air tubing to the non-weighted air manifold diffuser.
- Submerge Diffuser: Carefully place the air manifold diffuser into your pond, water garden, or aquarium. Ensure it is positioned where optimal aeration is desired.
- Power Connection: Once all connections are secure and the diffuser is in place, plug the 6-foot grounded power cord into a standard 110V electrical outlet.

Image: The PONDMASTER AP-40 SUPREME AIR PUMP unit, showing its compact design and air outlet.
Operation
The PONDMASTER AP-40 is designed for continuous operation. Once plugged in, the pump will immediately begin to produce a constant stream of air, which will be released through the diffuser into the water.
- Oxygenation: The primary function is to add vital oxygen to the water, supporting the respiration of fish and other aquatic organisms, and promoting healthy plant growth.
- Water Circulation: The air bubbles create water movement, aiding in circulation and helping to distribute oxygen and nutrients throughout the water body.
- Ice Prevention: During colder months, continuous aeration can help keep a small area of the water surface from freezing, allowing for gas exchange and preventing the buildup of harmful gases under the ice.
- Quiet Operation: The pump is engineered to operate quietly, minimizing disturbance to your environment.
Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your PONDMASTER AP-40 air pump. This pump features an oil-less motor, eliminating the need for lubrication.
- Impeller Cleaning: Periodically, the impeller may require cleaning to remove any accumulated debris or algae. This involves disassembling the pump. Refer to the detailed instructions provided with the pump for safe disassembly and reassembly. Exercise care not to overtighten components during reassembly, as this can impede impeller movement.
- Gasket Inspection: Inspect gaskets during cleaning. If gaskets appear worn or damaged, they should be replaced to maintain an airtight seal.
- Air Filter Check: Check the air intake filter (if present) for blockages and clean or replace as necessary to ensure unrestricted airflow.
- Tubing and Diffuser: Regularly inspect air tubing for kinks or blockages and clean the air manifold diffuser to ensure consistent bubble output.
Note: All parts are serviceable and replaceable. Contact customer support for genuine replacement parts.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump not operating / No air output | No power supply; Damaged power cord; Internal blockage or malfunction. | Check power outlet and connections. Ensure cord is undamaged. If problem persists, contact customer support. |
| Low air output | Kinked or blocked air tubing; Clogged air diffuser; Dirty air filter; Impeller needs cleaning. | Inspect and clear air tubing. Clean diffuser. Check and clean air filter. Clean impeller as per maintenance section. |
| Unusual noise or vibration | Pump not level; Loose components; Impeller obstruction. | Ensure pump is on a stable, level surface. Check for loose parts. Inspect and clean impeller. |
Specifications
| Model | AP-40 |
| Brand | PONDMASTER |
| Power Source | Corded Electric (110V) |
| Air Flow Capacity | 2900 cu. in./min. / 47.5 LPM |
| Maximum Pressure | 5.8 PSI |
| Item Weight | 10.73 pounds |
| Operation Mode | Automatic, Continuous Duty |
| Material | Alloy Steel |
| Cord Length | 6 feet |
Warranty and Support
The PONDMASTER AP-40 SUPREME AIR PUMP comes with a One-Year Manufacturer's Warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical support, or to inquire about replacement parts, please contact PONDMASTER customer service. Keep your proof of purchase for warranty validation.
Note: All parts are serviceable and replaceable. Unauthorized repairs or modifications may void the warranty.





