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When replacing a fountain pump or deciding on a new one particular, 1st there are some key terms to maintain in mind:

"Head": This is the maximum vertical lift of the pump. For instance, a 6' head signifies the pump is rated to pump water up to 6 feet high. Note, however, that at six feet the pump would be supplying quite little water, with gallons per hour around zero. So if you need to pump, say, 200 gph at 72", you will most likely need about a 300-600 gallon per hour pump to do the job.

"GPH" : Gallons per hour, generally rated at various heights

"GPM" : Gallons per minute, usually rated at diverse heights

"Pump Curve" : The amount of water volume "curved" according to numerous heights. A 500 gallon per hour pump, for instance, might pump 500 gallons per hour at " lift, 350 gallons per hour at 24" of lift, and so forth. When getting a pump for the 1st time or when in search of a replacement pump, it is vital that you know how a lot of 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 variables. 1 factor is the size of the pump, as covered above. But you also have to contemplate how wide your tubing will be. Tubing is measured in two ways: inside diameter (i.d.) and outside diameter (o.d.). Very skinny i.d. tubing will greatly minimize water flow. A lot of buyers are shocked when they uncover that, after hooking up their 500 gallon per hour pump to 1/2" inside diameter tubing, they are only receiving what they think about a trickle.

We had an engineer do some calculations for us to illustrate the dilemma. Using a 300 gph pump with 1/two" tubing is going to restrict your flow to 253 gallons per hour. By rising the pump to 450 gallons per hour, but nonetheless making use of 1/two" tubing, you will enhance volume only slightly, to 264 gallons per hour! The lesson is this: When acquiring a pump, uncover out what size of tubing is supposed to go with it. Another difficulty is operating the tubing also far. Lengthy lengths of tubing develop resistance. If your pump calls for 1/2" i.d. tubing, for instance, but you are running the tubing twenty feet from the pump, it is

a good notion to use three/four" tubing instead so as not to cut down also much on flow.

How considerably water do I require? What size of pump? This question is answered in component by whether or not you want a "trickle" or a roar. When you acquire a fountain, you will typically discover a recommended flow. For waterfalls, use this as a rule of thumb: for every single inch of stream width or waterfall "sheet," you will need to deliver 100 gallons per hour at the height you happen to be pumping. So if you are developing a 12" wide waterfall that is 3 feet tall, you need to have to purchase a pump that will be pumping 1200 gallons per hour at 3 feet of height. For tiny ponds, whenever attainable, it is a great idea to recirculate the water after

an hour, far more frequently if possible. As a result, if your pond is 500 gallons, attempt to get

a pump that will recirculate water at a rate of 500 gallons per hour. For genuinely

large ponds, this is not needed and is far as well high-priced.