Items TO KNOW ABOUT FOUNTAIN PUMPS
byon 07-04-2012 at 12:25 PM (184 Views)
"When replacing a fountain pump or choosing a new a single, initial there are some crucial terms to keep in mind:
"Head": This is the maximum vertical lift of the pump. For example, a 6 head indicates the pump is rated to pump water up to 6 feet high. Note, nevertheless, that at 6 feet the pump would be delivering really little water, with gallons per hour around zero. So if you want 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, usually rated at distinct heights
"GPM" : Gallons per minute, typically rated at different heights
"Pump Curve" : The amount of water volume "curved" according to different 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 purchasing a pump for the initial time or when searching for a replacement pump, it is crucial 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 factors. 1 element is the size of the pump, as covered above. But you also should take into account 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 tremendously minimize water flow. Many consumers are shocked when they uncover that, following hooking up their 500 gallon per hour pump to 1/2" inside diameter tubing, they are only acquiring what they take into account a trickle.
We had an engineer do some calculations for us to illustrate the difficulty. Using a 300 gph pump with 1/2" tubing is going to restrict your flow to 253 gallons per hour. By growing the pump to 450 gallons per hour, but still using 1/2" tubing, you will increase volume only slightly, to 264 gallons per hour! The lesson is this: When buying a pump, find out what size of tubing is supposed to go with it. Another problem is operating the tubing also far. Long 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 thought to use 3/4" tubing rather so as not to cut down too significantly on flow.
How much water do I need? What size of pump? This question is answered in element by whether you want a "trickle" or a roar. When you purchase a fountain, you will usually uncover a advised flow. For waterfalls, use this as a rule of thumb: for every inch of stream width or waterfall "sheet," you will require to deliver 100 gallons per hour at the height you are pumping. So if you are building a 12" wide waterfall that is three feet tall, you want to buy a pump that will be pumping 1200 gallons per hour at 3 feet of height. For small ponds, whenever attainable, it is a great thought to recirculate the water when
an hour, more typically if attainable. Thus, if your pond is 500 gallons, attempt to buy
a pump that will recirculate water at a rate of 500 gallons per hour. For genuinely
huge ponds, this is not necessary and is far too costly. kangen water machine"