Things TO KNOW ABOUT FOUNTAIN PUMPS

出典: くみこみックス

2012年7月14日 (土) 15:07の版

When replacing a fountain pump or selecting a new 1, initial there are some important terms to keep in mind:

"Head": This is the maximum vertical lift of the pump. For example, a portable water ionizer 6' head indicates the pump is rated to pump water up to 6 feet high. Note, however, that at 6 feet the pump would be delivering really tiny water, with gallons per hour ph testing strips about zero. So if you need to pump, say, 200 gph at 72", you will almost certainly need to have about a 300-600 gallon per hour pump to do the job.

"GPH" : Gallons per hour, typically rated at distinct heights

"GPM" : Gallons per minute, typically rated at distinct 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 acquiring a pump for the first time or when seeking a replacement pump, it is essential 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. A single factor is the size of the pump, as covered above. But you also ought to contemplate how wide your tubing will be. Tubing is measured in two techniques: inside diameter (i.d.) and outside diameter (o.d.). Quite skinny i.d. tubing will significantly minimize water flow. Several customers are shocked when they discover that, after hooking up their 500 gallon per hour pump to 1/2" inside diameter tubing, they are only getting what they take into account a trickle.

We had an engineer do some calculations for us to illustrate the dilemma. 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 utilizing 1/2" tubing, you will improve 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. One more issue is operating the tubing also far. Extended lengths of tubing produce resistance. If your pump calls for 1/two" i.d. tubing, for instance, but you are operating the tubing twenty feet from the pump, it is

a good concept to use 3/four" tubing rather so as not to cut down too significantly on flow.

How considerably water do I need? What size of pump? This question is answered in portion by no matter whether you want a "trickle" or a roar. When you acquire a fountain, you will usually locate a advised flow. For waterfalls, use this as a look into alkaline water machine rule of thumb: for every single inch of stream width or waterfall "sheet," you will want to deliver 100 gallons per hour at the height you're pumping. So if you are developing a 12" wide waterfall that is three feet tall, you need to have to buy a pump that will be pumping 1200 gallons per hour at three feet of height. For little ponds, whenever attainable, it is a excellent thought to recirculate the water once

an hour, a lot more usually if attainable. Therefore, if your pond is 500 gallons, try to buy

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

significant ponds, this is not essential and is far also costly.