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Originally Posted by HammerSandwich
Mx, testing head doesn't require much: just a vertical hose and a measuring tape. Drop a hose from your roof, measure how high the pump(s) can push the water, and you know the maximum head.
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Yeah but discharge head alone isn't worth much, it's the relationship between head and flow that's interesting and I don't own a flowmeter. I don't even have a 10m house, hose or measuring tape where I live ATM.
I'm studying and live in a very small student room. But back home I have a house high enough, 10m hose and a measuring tape. (and a car, damn I miss living back home!)
I could test head in a couple of weeks when I go home if noone else has already done it.
It seems like these pumps do perform better /w unlimited water supply at the inlet. Radical_53, the man behind the dual DDC top over at forumdeluxx wrote in
this thread over at XS:
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Originally Posted by Radical_53
this top will be available to the public quite soon. The problem I found when testing it was because the DDC 1+ pumps needed more water than we gave them... so now we developed a reservoir "complex" to give them all the water they need to work efficiently. Quite strange though...
Also, after some other test, we want to try if serial or parallel mode works best with a "standard" setup. Maybe these pumps do already have enough head that parallel mode would give slightly better perfomance. That has to be tested still, but we're all working on it. Like the question with the rad here, trying to find the best solution and get the highest
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Here's a pic of a pre-production sample w/o "reservoir complex":
I just got to have one of these!