I´m wanting to somehow demonstrate that if we measure the water flow on the header according to squetch for “Case 1” (see attached PDF) using a flowmeter previously installed, we are not going to get the same number for the GPM as if we proceed according to squetch for “Case 2”, where in order to “spare the cost of a flowmeter”, we disconnect the hose, direct the water flow into a deposit, and measure time elapsed via a stopwatch. Here, according to the volume of the deposit, and the elapsed time, we calculate the GPM. If we are discharging to the atmosphere we are getting rid of the losses that represent the nozzle, which has a number of holes drilled on it´s top plate. So I was wondering if there is a table somewhere on the net which would show the “equivalent lengh of pipe” for different kind of nozzle arrangements.(adsbygoogle = window.adsbygoogle || []).push({});

Thank you.

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# Calculating water flow.

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