you these specialized pumps all by themselves

"Head": This is the maximum vertical lift of the pump. For example new balance 996 nz , a 6' head ans 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. See a "pump curve" for the amount of water pumped to various heights. Major pump manufturers like Cal Pump, Fountain Tech pumps, and others, include pump curves on their boxes new balance 420 nz , brochures, or other literature. You ould take a good look."GPH" : Gallons per hour, usually rated at different heights"GPM" : Gallons per minute, usually rated at different heights"Pump Curve": The amount of water volu "curved" aording 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 ti or when seeking a replent pump, it is essential that you know how many gallons per hour you want to pump and at what heighth (head).Water Volu: The total volu that you will be pumping is controlled by a few ftors. One ftor is the size of the pump, as covered above. But you also must consider how wide your tubing will be. Tubing is asured in o ways: inside diater (i.d.) and outside diater (o.d.). Very skinny i.d. tubing will greatly reduce water flow. Many custors are ocked when they find that new balance 574 mens cheap , after hooking up their 500 gallon per hour pump to &fr12; inside diater tubing, they are only getting what they consider a trickle. Well, we had an engineer do so calculations for us to illustrate the problem.Using a 300 gph pump with &fr12; tubing is going to restrict your flow to 253 gallons per hour. By increasing the pump to 450 gallons per hour, but still using &fr12; tubing, you will increase volu only slightly, to 264 gallons per hour! The lesson is this: When purchasing a pump, find out what size of tubing is supposed to go with it. Another problem is running the tubing too far. Long lengths of tubing create resistance. If your pump calls for &fr12; i.d. tubing, for instance, but you are running the tubing enty feet from the pump, it is a good idea to use &fr34; tubing instead so as not to cut down too much on flow.How much water do I need What size of pumpThis question is answered in part by whether you want a trickle or a roar. When you buy a fountain new balance 574 nz sale , you will usually find a rended flow. For waterfalls, use this as a rule of thumb: for every inch of stream width or waterfall "eet," you will need to deliver 100 gallons per hour at the height you're pumping. So if you are building a 12 wide waterfall that is three feet tall, you need to buy a pump that will be pumping 1200 gallons per hour at three feet of height.For ponds, whenever possible, it is a good idea to recirculate the water once an hour, more often if possible. Thus, if your pond is 500 gallons, try to buy a pump that will recirculate water at a rate of 500 gallons per hour. For really large ponds, this is not necessary and is far too expensive. For a nice waterfall effect new balance 574 nz , we usually advise about 4000 gallons per hour or more at the top of the waterfall. This creates enough volu for a wide, craing spill. Adjust stones to soften the spla if desired.When Is an External Pump AppropriateIn-line pumps provide the "most bang for the buck" in o ways. For one, the purchase price is quite reasonable for the high volu of water being pumped. But even more importantly, these pumps dramatically outperform typical subrsible pumps, cutting electrical costs o to three tis. Since electrical costs for a large pond can easily run from thirty to one hundred dollars a month, choosing the most energy-efficient pump is trendously important.However, if you need a lot of "head," that is, if you are pumping to a height of more than say, seven or eight feet new balance 574 womens sale , or if you must pull the water (not "pu", for in-line pumps pu water fine but dont pull well) a long distance from the pond to a skimr located far away, then these pumps probably won't work for you.How About Battery-Operated Fountain PumpsFountain Mountain, Inc. receives many, many calls about battery-operated pumps. While there are panies who manufture pumps that can operate on "A" and "AA" batteries, we have not found a battery-operated pump that lasts or that is reasonably priced. For those custors who need battery fountains for wedding centerpieces (a mon request), we suggest you buy as many as possible battery-powered fountains at a store like Wal-Mart and remove the pump from the fountain. You get the whole fountain for as good of a price as we could get you these specialized pumps all by themselves, and we dont have to order 500 of them at a ti!What About Solar PumpsFountain Mountain, Inc. also receives many inquiries about solar pumps. These are okay, but we have decided not to carry them because of a few reasons. For one new balance 574 womens , these pumps, like battery-operated ones, just arent so trusorthy; they dont last as long as a regular pump. For another, they go on and off constantly depending on quality of sunlight, passing clouds, etc. unless you buy one that works on batteries and solar. Then you have to keep repling batteries. Also, the ones that work on both solar and batteries are expensive for the little bit of water they will pump. Finally, what decided it for us was that so panies allow credit card charges for all of their products except for solar pumps. This ans to us that the panies are afraid of too many returns from custors. Eventually, the technology might be there for us to sell them, but we are not quite ready.Where is the Pump MadePumps new balance womens shoes sale , like anything else, are made all over the world, and we suggest you buy pumps from soone who will stand by a guarantee and who has testing programs before marketing their pumps. It used to be that Asian pumps were quite bad but this is changing.