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My post does not include irrigation, lawnwatering. Moderate use of clothes washing machine like one load per day is included.

Is this a change in units? Hansid, are you talking about l/c/d where c is customer which can be several people like a family? In u s we use 2.5 people per meter or customer in residential areas average unless disrtict has better census or statistics. All the numbers I used above are per...

This is to supply numbers and conditions for two US communities. 1. Ordinary medium income county, moderate lawn watering, lots of heavy industry which draws its own water from wells or river and some industry which uses drinking water. Winter usage 30 mgd(million US gallons per day) for...

My present client has standardized on Watson marlow Peristaltic tube pumps. http://www.watson-marlow.com/watson-marlow/index.htm I don't know that much about them but client has gotten away from diaphram pumps in recent years. Gumlog PE

Is it true that d also increases and become very large in free fall which makes the reynolds number large and tending toward turbulent flow?

I believe we are all on the same sheet of music and I do mean music. If any more discussion is desired I would be willing to talk about this as long as anybody wants to. This has been a very good workout in concepts among three patient and courteous engineers and I have enjoyed it very much. I...

If you write the Euler equation: v1**2/2gc+p1/gamma+z1+work of the pump = v2**2/2gc+p2/gamma+z2+work of the turbine+head losses from point 1 to 2, and the points 1 and 2 are sufficiently far apart specifically that point 2 is far enough down stream that all local momentum effects have settled...

Waseem and BobPE, Actualy the energy in the stream at the exit of the valve still exists and is not absorbed by the exit losses. Only the static pressure in the jet leaving the nozzle or valve is zero. The Total pressure is still there....it is the velocity pressure at the outlet. Remember...