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Old March 10, 2017   #4
Cole_Robbie
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Join Date: Jun 2012
Location: Illinois, zone 6
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Your cheapest pump will be a shallow well pump from a Home Depot/Lowes type of store. They are about $200. They're not meant for irrigation, though, and the new ones have internal shutoff switches for when the pressure gets too high, due to flow being too low. To get around that issue, you can plumb a T into the line and place a pipe going back to the original tank with a valve. Open that valve a little to relieve pressure off the pump. Once you get it right, you shouldn't have to adjust it any more.

The advantage of using a big pump is that you can use plastic tanks, which are a lot cheaper. If you used a small pump and an accumulator tank, it would have to be made of metal in order to hold pressure, and thus would be a lot pricier. If you use a well pump, plan on it having its own dedicated 15 amp circuit.

Or just build a water tower A cheap sump pump will have up to 20' of lift. Once the water is in the air, you have pressure to tap, without having to charge the tank with a pump.
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