myv65 -
Ok let me think about this.. I may actually have to try this experiment.
If I have a pump with a 1" outlet and measure the backpressure seen by the pump I'll see.. X
Now I add one .250 fitting, I'm sitting at the pump I will see some new backpressure X250
Now I add a 1" pipe behind the 250.. the backpressure seen at the pump should not go up.
Finally I add another .250 fitting. My pump is pulling water from a pond or something. When I add the second .250 fitting, your telling me that the pump will see twice the backpressure as it did with a single 250 fitting? My backpressure seen at the pump is 2*X250?
That seems very counter intuitive. And I believe it is a valid question to ask how the pump could possibly see 2x the resistance??
The intuitive answer is that when the second 250 fitting is added there will be some drop in flow and some increase in backpressure. HOWEVER that drop should not be near as significant as the 1st.
Please explain this to me
