Also put together another aluminum block for testing.
I tried getting a flow rate but it went through so fast I can't be too accurate. It took 13-14 seconds to blow 2 gallons through the pump and block. I had 1 ft of 1/2" I.D. hose on the intake bent down in a tub with three gallons of water in it. The pump was on a paint can beside the tub and I had 1 1/2 ft of 1/2" I.D. hose to my waterblock suspended above so the total rise was near 3 ft considering the height of the pump and outlet barb.
7s per gal = 8.57 gal per min = 514 gph @ 3' head, pump + block
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