Okay, I've been reading about pipe size, dynamic head, head loss, flow rate, etc. it is often confusing and very daunting, but I'm trying to understand. One thing is puzzling me: looking at flow curves for a two speed Whisperflo, specifically the low speed curve, none of the shown dynamic head values are above 22 or so. Does dynamic head drop this much when flow rates decrease? If it doesnt, how do these speeds work against higher dynamic head values?
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