heres how your pump works,basically its a cetrifical pump,it builds pressure by having a larger inlet than outlet. This builds pressure just like putting your finger over the end of a water hose. Since this restriction is built into the pump you can go to a larger size pipe. But if you go smaller you are simply decreasing the flow rate but increasing pressure. Going larger does just the opposite it increases flow,(up to pumps capacity of course) but it DECREASES pressure as long as pipe was flowing wide open.Just like putting the end of a water hose in the end of a two or three inch pipe,same amount of water goes out as in but less pressure until you restrict it back down and increase pressure again.What you have to watch out for though is building up so much head that pump simply cannot lift it to start.By going to a larger pipe you are creating back pressure simply from the weight of water making pressure on the outlet of pump. If I were going larger that far i would seriously consider putting a check valve in a few feet above pump.that would hold the head pressure until running pump built up enough to overcome it,and make your pump start easier.Head pressure is the weight of water above the water level in well.Since water seeks its own level so to speak head up to that point is simply neutral or equal.Water would stand that deep in your pipe regardless if pump is running or not.Above that point you have to lift it and thats the amount of head.Avoid getting so much head that your pump wont overcome it.if you do pump may run ,but since no water is going out,none comes in and it wont pump,and it wont build pressure.By putting check valves( or series of check valves) you can hold so much head pressure off pump.Then your head would be simply from water level to first check valve above the pump.Since freshwater is a pretty much standard weight,this figure is lots of times given in your pump specs as a gallon figure.By knowing this ,and the water capacity of your pipe,you can calculate where to set checks.
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Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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