Dear Mohd Arshad， In my ...
Published by wu hao, Technical Expert at Veolia
Dear Mohd Arshad，
In my understanding， your question is below：
You have a big customer with water demand 40m3/hr（average water flow）, and you need to confirm pipe DN /velocity during design phase.
On this condition, you need to know this bid customer's consumption pattern and internal tank volume. And then, please check the public water network, including water pressure, pump operation,...
Finally, you will address the fitful pipe DN and velocity.
BR,