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#1
08-08-2009, 08:16 PM
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So your argument is simply that we were using the wrong terms, calling everything head pressure where as theres two different concepts: head pressure and flow restriction. Like the way everyone calls all sea slugs nudibranches... Never mind then.
 I blame Delbeek and Sprung for mixing me up. "Head pressure refers not only to the vertical distance a pump must push the water, but also any resistance to flow created by pipes, fittings, and valves." The Reef Aquarium Vol 3
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"We shall dive down through black abysses... and in that lair of the Deep Ones we shall dwell amidst wonder and glory forever." - H.P. Lovecraft Old 120gal Tank Journal New 225gal Tank Journal May 2010 TOTM The 10th Annual Prince George Reef Tank Tour Last edited by whatcaneyedo; 08-08-2009 at 08:22 PM. 
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#2
08-08-2009, 08:37 PM
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What we commonly referred to Head maybe more accurately is Dynamic Head, being the Static Head (the height part) plus friction (from couplings valves etc), and is for example what the RC Head Loss calculator, calculates.
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my tank
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#3
08-08-2009, 08:39 PM
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But in the instance in this post, where you said to close off the other outlets, above the check valve, that would not have made a difference in the head pressure keeping the check valve closed.
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Dan Pesonen Umm, a tank or 5
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Hybrid Mode
