I know there is some discussion on this in the forum but I haven't found anything that quite answers my question. I am doing a remodel of an old kitchen to make it a master bath. I am putting the shower where the sink was. There is a 3/4" cold line and a 3/4" hot line in the floor. I want to put in two separately controlled shower heads, one on each end of the shower. I wan to make sure I have the flow and pressure to do this. I did a flow test on a faucet outside and got a tad over 5 gpm. The shower head I was going to use is 2.5 gpm at 80 psi. The plan was to come out of the floor with a 3/4" line for hot and one for cold, tee off with a 1/2" line in each direction going to each shower valve. My question is do I have the flow and pressure that I need for this configuration. I want to be able to run both showers at once. Should I test the pressure in the lines?