Plumbing Help in The Tailgate Posted January 25, 2012 I have a shower that isn't functioning correctly. It has a single handle that rotates counter clockwise to increase water temp. There is a pull knob underneath the handle that activates the diverter to change the water from the tub to the shower. When the water is at a low temp, I can pull the knob and the shower works fine. However, if I increase the water temp by rotating the handle, the pressure drops and the diverter no longer functions. There is still decent water pressure but not enough to keep the diverter engaged. Any ideas on how to fix this? Faulty diverter? Any way to get more water pressure? I have 4 other showers that work fine and they all have the same/similar hardware. Any help is appreciated.