I am trying to measure my pool pump flow. I am using an INTELLIFLO® VARIABLE SPEED pump. I tried to calculate it using the pressure gauge, and vaccum gauge which I installed on the pump. Here are my readings:
On speed 2350 rpm, I have 10 Hg, and 20 psi. When I use the folowing formula to calculate the flow
TDH = Vaccum reading * 1.13 + pressure reading * 2.31, I get 57.5 for TDH
The problem is that 57.5 feet for TDH does not make much sesne by looking at my pump performance curve for 2350 rpm, which I have attached. My pump flow look pretty fine, and the pump seems to be doing pretty good filtering.
Can someone help me understand what I am doing wrong?