When replacing a fountain pump or choosing a new one, first there are some key terms to keep in mind:
“Head”: This is the maximum vertical lift of the pump. For example, a 6′ head means the pump is rated to pump water up to 6 feet high. Note, however, that at 6 feet the pump would be providing very little water, with gallons per hour around zero. So if you need to pump, say, 200 gph at 72″, you will probably need about a 300-600 gallon per hour pump to do the job.
“GPH” : Gallons per hour, usually rated at different heights
“GPM” : Gallons per minute, usually rated at different heights
“Pump Curve” : The amount of water volume “curved” according to various heights. A 500 gallon per hour pump, for instance, might pump 500 gallons per hour at 0″ lift, 350 gallons per hour at 24″ of lift, and so forth. When buying a pump for the first time or when seeking a replacement pump, it is essential that you know how many gallons per hour you want to pump and at what height (head).
Water Volume The total volume that you will be pumping is controlled by a few...
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