i am taking a design course in pipework and sanitary and now we are taking a section where we need to design pipe sizes by estimating their diameters , so we have a table one for steel and the other is for copper pipes, the complicated things comes in when we want to choose the diameter for the pipe depending on the flow rate demanded by consumers note:- (all cold water supply)to illustrate more-further a good example of that is when we want to design a pipe diameter for a copper pipe that is connected to a bath demanding a flow of 0.9 l/s i get stuck here there is so many options to take from the tables !!the teacher is unclear and have no specific criteria about how to choose the most fitting pipe diameter !!so what to do ?? please i need help in this one
