I've searched at several sites that carry Quiet one water pumps.
The one that would push the most through a system I was able to find:
Model #4000 high head
Free flow rate of 980 gph.
Max head rate of 13'
watts draw of 120 watts
But this pump would fall far short of 30lpm system flow, yet it is the highest head rate I've found so far for a Quiet one pump.
While you may well have a model I wasn't able to find yet this shows that something is wrong with the stats you are giving for your largest pump. It just can't possibly have 1100gph with a draw of only 80 watts yet drive a flow of 30lpm through a LRWW block. A 80 watt pump just isn't strong enough to push such a system flow rate.
Sence I read your posts with BillA and Cathar I've been searching. Not just for a Quiet one pump that could meet those performance figures while drawing only 80 watts, but for any pump by any maker that could do so. After searching a number of sites I've come to believe such a pump does not exist. Closest I've seen was a Iwaki MD-70rlzt with 20m of head rate, but a wattage draw that was sky high.
Could you please post your Quiet one model number and full stats for it? That should help solve the issue.
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