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Old 10-09-12, 03:10 PM   #4
Daox
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A quick google search came up with this chart:

from this PDF




Lets use the above parallel example of 18 parallel lines and using 1/2" pex for everything. It is going to have to flow through the tee as a run for 7 fittings, and as a branch for 2 fittings. That gives us an effective additional length of:

16 * 2.2 = 35.2ft
2 * 10.4 = 20.8ft

Or a total of 56 extra feet.

56 extra feet at 1 gpm gives us an additional pressure head of 2.3 inches of water. That would bring the total pressure head up to just about 2.9 inches of water even. Still quite a bit less than the 6.6 of the standard setup.
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Last edited by Daox; 10-16-12 at 10:25 AM..
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