Quote:
Originally posted by BrianH
Yes, I would also assume PSI also 
For the 1/2" low flow units, the pressure drop for 3 GPM (180GPH) rate is very low (ie almost zero)
Most of us are lucky to get more that 90 GPH (1.5GPM) flow thru our systems.
But I see now that they only go down to 1.5GPM. Oh well, you guys with higher flow rates might want to look at this
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It's no good.
The flow range from 0.5 to 5 gpm is only for the 1/4" port, which drops 3 psi at 3 gpm. The units with the 1/2" ports start measuring flow at 4gpm.
Oh well.