Does any of this change my statement that 1" pex flow enough water to satisfy almost any residential need? That was the original question wasn't it.
I'm not going to argue the point any further, but the fact remains that discounting the proper numbers for feet per minute... turbulent vs. laminar flow... pipe erosion blah blah blah. 1" pipe will move more water than that. I know that 8-10 is recommended numbers but if you apply pressure, the flow will increase. Hold on to a 1" forestry hose fighting brush fire and you will get what i mean. DISCLAIMER: I do not recommend or condone the use of forestry hose, fire trucks or brush fires in home heating applications.