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Aquascape AquaSurge 3000 Pump Pumps 91018 AquaSurge second-generation asynchronous skimmer, waterfall and filter pumps provide a combination of energy-efficient performance, flow and ease of maintenance. The oil free design prevents pond contamination and provides years of trouble-free operation. Can be used vertically or horizontally and contains rubber feet to prevent noise and vibration. - Asynchronous skimmer, waterfall and filter pump combining energy efficient performance, high flow rates and ease of maintenance - Extremely energy-efficient, saving hundreds of dollars over traditional water pumps - Designed for use in skimmers and falls filter systems as well as Pondless Waterfall filter vaults - 3196 Max GPH, 0.75 inch/1 inch/1.25 inch/1.5 inch/2 inch Discharge, 165 Watts, Max. head height 14.76 ft and 20 ft. cord length
- Ideal for ponds, pondless waterfalls, and other water feature applications; pumps up to 3,196 gallons per hour (GPH)
- Designed for use in skimmer and waterfall-filter systems; made for continuous use in either vertical or horizontal orientation
- Energy-efficient asynchronous pump design more powerful than traditional magnetically driven pond pumps. Motor Type: Asynchronous
- Comes complete with all necessary fittings; rotational ball output allows discharge position to be easily adjusted
- Measures 12 x 5.5 x 7 inches (LxWxH); 20-foot power cord; 3-year limited warranty
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Dynamic Head
The effect of the Earths gravity on the "lift" or head pressure is fairly simple; for every vertical foot of distance the pump moves the water you are adding one foot of head pressure so the ratio is a 1:1 ratio. The effects of the friction, caused by water as it travels through your hose or pipes, on the total head pressure is a little more difficult to calculate especially as there are slight variations in pipe friction in different hose materials and the smoothness of the inner bore. Basically. for every ten feet of pipe through which the water has to travel travel horizontally will contribute 1 foot of head height; the ratio of the pipe friction loss is a 10:1 ratio.Plumbing fixtures and bends and corners in your hose also increase the total head you must calculate to ensure the proper final volume from your pump. Every corner with a 90 degree elbow in your plumbing will add 1 foot of head pressure with a 1:1 ratio. 45 degree elbows, tees and even insert couplers can all have an impact on the final flow.
If you install a pump 40 feet away from the top of your waterfall which is 6 feet above the pump and the tubing is a single run of 40 feet horizontally then you add 4 feet of head for the tubing length (the 10:1 ratio) to the 6 foot differnetial between the pump location and the final height of the waterfall so your final total dynamic head calculation would be 10 feet. This means your final volume of water flow in this water feature or application would be the volume of flow on the performance curve that equaled the gallons per hour at 16 feet. This volume will certainly be much less than the initial volume the pump can move at an open flow or a zero head.
If in the above example your 40 feet of horizontal tubing run also required 3 elbows of 90 degrees then an additional 3 feet of theoretical head would be added and your final flow result would be at 19 feet on the performance curve of the pump. In this example you would want to choose a pump that has the desired GPH rating at 9 feet of head pressure. Tubing size is also an important factor in accounting for head pressure loss, in general you should never reduce the diameter of the tubing below what the output size of the pump is, this will drastically increase head pressure, and reduce pump performance. For maximum pump performance, using the largest tubing that is practical is the best choice. A best practice is to use a hose with an inner diameter that is the same as your pumps outlet fitting.