i have a triton mixer shower working off a gravity fed system, when i hold the shower head close to the tray pressure is good but as i raise the shower head up the riser rail then the hot slows to a trickle. hot & cold are both gravity fed & have the same run of pipe. The shower has recently been moved 6 feet across the room shortening the pipe runs & lowering the shower head. There is also another shower behind the wall to this one working off the same pipework & working well.Im clueless so any advice please.
