I just installed a brand new american signature manifold with the hot,cold, and diverter combo. I did this using the shark bite fittings. I took a shower for the first time with no problem today. I decided to turn the ater on again and here is where the problem starting happening. The hot and cold if you turn the knob to fast it will make the vibrating noise and also limit the flow of the water. If I turn the diverter to the shower head I have no problems. PLEASE HELP IM CONFUSED!!