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Author:
Mr. Ramos (NJ)
Hi there,
My class is building a hydroponics system. System will have four growing rows. Fluid to each growing row will be controlled by a ball valve. My logic is: 1/4" feed to each row from a 1" pipe. 1/4" x 4= 1". Is the 1" manifold, reduced at each valve to 1/4", correct. We need a constant flow to each growing row. Water will be pumped from a tank to a height of 3 feet. Thanks,
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Author:
steve (CA)
My only comment is on the ¼" x 4 = 1". That's incorrect. A 1" circle has an area of .785 sq/in. and a ¼" circle is .049 sq/in., so ¼" x 16 = about 1".
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Author:
KCRoto (MO)
Be careful when narrowing the flow out of the manifold. When you reduce the size of the outlet like you are describing, it will be under more pressure, like putting your thumb over a garden hose. I would use 3/4" ball valves and adjust them to restrict the flow as required for equal distribution. When the water goes through the smaller opening of the partially restricted valve it will act like the garden hose, but adding a short piece of 3/4 pipe with a 45 degree bend and another short piece to direct the flow, it will slow back down and not try to erode your media in the growing area. Out of curiosity, are you doing this complete with a fish tank as a self sustaining aquaponics system?
Edited 1 times.
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Author:
bernabeu (SC)
the area of two circles varies as the square of the diameter
e.g.
4" pipe ~ 4x4=16
2" pipe ~ 2x2=4
ergo a 4" pipe will feed 4 - 2" pipes
the above does NOT account for any losses due to friction
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Author:
Mr. Ramos (NJ)
Yes. My 7th and 8th graders are building hydroponics system in the science lab. The system has four growing rows. We need help figuring out how to supply each row with appropriate amount of nutrient by controlling valves. Also, we needed help figuring out pump size. Thanks for your help
Edited 1 times.
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Author:
Mr. Ramos (NJ)
Yes. My 7th and 8th graders are building hydroponics system in the science lab. The system has four growing rows. We need help figuring out how to supply each row with appropriate amount of nutrient by controlling valves. Also, we needed help figuring out pump size. Thanks for your help
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