Answer: Pumps should only be operated with an outdoor outlet that has a GFI or ground fault interrupt on it so check your electical source first. If it is a small submersible pump, make sure the connection holes and intake are clean of debris, put it completely under water and turn it on to see if it pumps. If so, hook it up to the fountain (usually via flexible plastic tubing run from the pump outlet to the fountainhead) and there you go. If it does not pump, you will need to have it serviced by the manufacturer or replace it. Most submersible pumps must be kept underwater or they will be ruined, however they are usually relatively inexpensive to replace. If it is an above ground pump with a filtration system, please contact the manufacturer(s) or a retailer that carries that brand for assistance. Your local water garden supplier will also usually have demonstrations, how-to sessions, and many products on display. I always learn a lot by reading the labels and installation instructions on similar products to what I have at home. Good luck with your fountain!
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