Hey Camelot,
As a point of reference, I measured 141 GPH through my Maze 2.1 block (1/2" hose barbs) using an Eheim 1250 and two 18" pieces of 1/2" ID hose. With the Maze3, I get 153 GPH.
In a working system (E-1250, BIE radiator and 6' of 1/2" ID tubing) its more like 110 GPH for the Maze 2.1 and 125 GPH for the Maze3.
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