Drive systems difference
Magnetic Drive: In a magnetic-drive pump, an electrical charge creates a magnetic field that causes the magnet on the impeller to rotate and pump water. Magnetic drive pumps are completely sealed and do not require lubrication. Because they do not contain oil, magnetic drive pumps are safer for ponds with fish as oil leaks do not occur. This type of pump does not generate high head heights, meaning it is unable to lift pond water vertically, which you might need to supply water to a fountain.
Work best in cleaner environments with little or no debris Highly efficient, cost-effective operation Since they have no seals to wear out, they require little maintenance Occasionally clean the impeller and its chamber to ensure efficient operation
Direct Drive: Direct-drive pumps have an enclosed motor that is powered by electricity, which turns the impeller shaft. Direct-drive pumps achieve significant head height so they tend to work well for fountains or waterfalls. Some models seal the motor in an oil-filled shell with seals around the cord and impeller shaft. These are risky to use if you have a pond stocked with fish as there is an ever-present danger of water contamination if a leak occurs. Many newer pumps, however, feature alternative lubrication over oil that is safe for fish. Look for oil-free models if you house fish or other aquatic life in your water garden.
Typically more expensive to operate Ideal pump type for fountains or other accessories Pushes water rather than pulling it Not easily repaired by the user
Aug 27, 2008 |
VIA Aqua Pump 4900