Product Overview
The Atlantic Water Gardens MD-Series magnetic induction pumps are engineered for efficiency and durability, making them an ideal choice for small water features and fountains with low head heights. These submersible pumps are designed for heavy-duty use and come equipped with essential components for reliable operation.

Image: The Atlantic Water Gardens MD550 Energy Efficient Water Feature and Fountain Pump, a compact black unit with a threaded outlet and a perforated pre-filter.
Setup Instructions
Proper setup is crucial for the optimal performance of your MD550 pump. This pump is designed for submersible use.
Pump Placement and Connections
- Ensure the pump is fully submerged in water for proper cooling and operation.
- The pump features male threads on both the inlet and outlet for secure plumbing connections. The volute can be rotated to accommodate various pump orientations, providing flexibility in installation.
- Connect appropriate tubing to the pump's outlet. The pump is compatible with TidalWave Fountain Heads for diverse water feature designs.
- The pump is equipped with a 20-foot power cord. Ensure it is connected to a grounded electrical outlet.
Selecting the Right Pump and Plumbing
To ensure your water feature operates as intended, it is important to select the correct pump and plumbing size based on your specific setup. The following video provides a detailed guide on how to calculate the Total Dynamic Head (TDH) for your application, which is essential for choosing the perfect pump.
Video: A guide from Atlantic Water Gardens on "Choosing the Perfect Pump by Calculating Total Dynamic Head." This video explains how to determine the appropriate pump size and plumbing for your water feature to achieve desired flow and efficiency.

Image: Diagram highlighting key features of the MD-Series pump, including oversized male threaded inlet/outlet, rotating volute, removable stable base, and removable pre-filter. It also notes the 5-year warranty.

Image: A chart illustrating the maximum flow rates (GPH) for various MD-Series pump models at different head heights (in feet), aiding in pump selection for specific applications.
Operating the Pump
The MD550 pump utilizes magnetic induction technology for efficient and quiet operation. Once properly installed and connected to power, the pump will begin circulating water. Its energy-efficient design ensures lower operating costs.
Optimizing Water Flow
The pump's design, including male threads on both the inlet and outlet, is optimized for less restrictive flow, leading to higher performance. The rotating volute allows for flexible pump orientation to best suit your water feature's design and maximize flow efficiency.

Image: A natural-looking water feature with a small fountain, demonstrating the type of application suitable for the MD550 pump.
Maintenance
Regular maintenance ensures the longevity and efficient performance of your Atlantic Water Gardens MD550 pump.
Cleaning and Component Care
- Pre-filter: The pump features a removable pre-filter. Periodically remove and clean the pre-filter to prevent debris buildup and maintain optimal water flow.
- Impeller Assembly: The impeller assembly is replaceable and easily accessible with a quarter-turn of the volute. Regular cleaning of the impeller assembly is recommended to prevent clogs and ensure smooth operation.
- Ceramic Shaft: The pump is equipped with an oversized ceramic shaft, which is designed to resist wear better than steel, contributing to a longer service life. Inspect the shaft during impeller cleaning for any signs of wear or damage.
Troubleshooting
If your MD550 pump is not performing as expected, consider the following common issues:
- Reduced Flow or No Flow:
- Check the pre-filter for excessive debris. Clean if necessary.
- Inspect the impeller assembly for blockages or damage. Clear any obstructions.
- Verify that the tubing is not kinked or obstructed.
- Ensure the pump is fully submerged and the water level is adequate.
- Pump Not Turning On:
- Check the power connection and ensure the outlet is functioning.
- Inspect the power cord for any visible damage.
- Unsatisfactory Water Feature Appearance:
- This can often be due to an incorrect pump selection for your specific water feature's requirements (Total Dynamic Head). Refer to the "Choosing the Perfect Pump" video in the Setup section to re-evaluate your pump and plumbing specifications.
Specifications
| Attribute | Detail |
|---|---|
| Brand | Atlantic |
| Model Number | MD550 |
| Material | Polypropylene (PP) |
| Product Dimensions | 4.5"L x 3.5"W x 5"H |
| Power Source | Corded Electric |
| Item Weight | 2 Pounds |
| Maximum Flow Rate | 550 Gallons Per Minute (GPH) |
| Voltage | 115 |
| UPC | 727429003565 |
| Manufacturer | Atlantic Water Gardens |
| Specific Uses | Outdoor water features |
Warranty Information
The Atlantic Water Gardens MD-Series pumps, including the MD550 model, come with a five-year limited warranty. Please retain your proof of purchase for warranty claims. For detailed terms and conditions of the warranty, refer to the documentation included with your product or contact Atlantic Water Gardens directly.
Support
For additional support, product information, or to explore other Atlantic Water Gardens products, please visit the official Atlantic Store:





