Guest guest Posted December 22, 1999 Report Share Posted December 22, 1999 > > I need to know if I need pressure hose and pipes, and if so, what gauge? Certainly Carol is the authority on this issue. Just some thoughts. The higher the fall, the greater the pressure. If you are only ten feet above highest point, you shouldn't have to worry about too high pressure on only 2 acres, unless they were virtually cliff side. The greater concern than pressure will be traffic over the pipes. Where they are developing springs on NV property, if they is only animal or light traffic over collection lines, they use corrugated pipe, but switch to schedule 40 where there will be routinue tractor traffic. It matters if you are burying the pipes or not, what kind of traffic will be going over them etc, more than the water presssure that you should be concerned about, IMHO. Managing which outlets are open will have some importance when watering, as you will get greater flow at the lower elevations then the higher ones. I have a spring about 10-15 feet above one garden. It does about 50 to 200 gallons a day. I run it down to the garden in several hundred feet of garden hose. It flows with very low pressure, more would be better. I can only put one dripline on it at a time. It collects in a 400 gallon tank, that usually I let fill up and then flow out all at once, get better distribution throught he driplines that way. With your 1.5 inch line, you will get better flow, then my small 1/2 inch line garden hose, plus you may have a short run of pipe. > > > We would do the whole thing with Bamboo pipes, feeding troughs at the ends > of the beds and then use watering cans, or even punctured bamboo (as drip > irrigation, but I am not sure if that can be done), but this would take a > lot more time, and we need to get a lot of things going asap, so we can > survive. > > If no one has the time to work this out, please let me know how you > calculate water pressure. > > Thanks > Your Servant > Samba das Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 22, 1999 Report Share Posted December 22, 1999 Haribol to All You won't need high pressure hose or pipe unless the pressure exceeds 120 psi. you won't need them then even unless their is a pressure vessel involved. Easiest way is to have a float valve in your tank when the tank volume reaches a certain point it starts to drain to your irrigation system. No pain or hassle you just have to move the hose around or open and shut valves. To get the fall (pressure of the amount of water from highest point to lowest point) is Hight(H) or head of in feet Pressure (P) in LB per sq. inch Head pressure=.43xH Plastic pipe will work in most irrigation systems. No sweat unless you have a two hundred foot slope over two acres. Even then don't sweat the small stuff. Carol Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 24, 1999 Report Share Posted December 24, 1999 > To get the fall (pressure of the amount of water from highest point to > lowest point) is Hight(H) or head of in feet Pressure (P) in LB per sq. > inch Head pressure=.43xH Hmmm. I am a bit stupid when it comes to calculations, and I dont quite get this. Does this mean that if the base of my tank is 10 feet up in the air, then the pressure I get at ground level is 4.3 psi? What about the dimension of the tank? I mean if the tank is 10 feet high, and 6 feet across, or 10 feet across and 6 feet high, does that make a difference? Then what about pipe pressure ratings? Here they quote them as pn or is it pu. What does that stand for? Some people have pipe at pu 19, others at pu 3. Which is the higher pressure? (is it like gauge? from my memory the higher the gauge the thinner the metal sheet). Enlighten this poor fool please. YS Samba das Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 3, 2000 Report Share Posted January 3, 2000 On 24 Dec 1999, Samba das wrote: > > To get the fall (pressure of the amount of water from highest point to > > lowest point) is Hight(H) or head of in feet Pressure (P) in LB per sq. > > inch Head pressure=.43xH > > Hmmm. I am a bit stupid when it comes to calculations, and I dont quite get > this. Does this mean that if the base of my tank is 10 feet up in the air, > then the pressure I get at ground level is 4.3 psi? This is correct, but it also means that if you drop down the hill another 10 feet in elevation to you outlet in the pipe you will pick up another 4.3psi minus any loses in the pipes. > What about the dimension of the tank? I mean if the tank is 10 feet high, > and 6 feet across, or 10 feet across and 6 feet high, does that make a > difference? The volume of the tank doesn't make any difference in the static presure at the outlet. > Then what about pipe pressure ratings? Here they quote them as pn or is it > pu. What does that stand for? Some people have pipe at pu 19, others at pu > 3. Which is the higher pressure? (is it like gauge? from my memory the > higher the gauge the thinner the metal sheet). Most pipe will come with the specs. printed on the side if not ask your distrubutor. Your Servant Mangala Artika Dasa Quote Link to comment Share on other sites More sharing options...
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