I have a Waterpik shower head attached to a standard shower arm. One pic shows the head. The other shows with the spray part of the head removed so you can see the size of the orifice that the water flows through out of the arm. Measuring the orifice it is 5/16 inch diameter. If I attach a diverter with a 1/4 turn "selector" and that has an orifice of the same size (5/16 inch) will that affect the flow to the head itself? I don't want to negatively impact the spray from the head. Thanks!