The above stated model has next to no hot water coming out of the valve from the tub spout or showerhead. I completely took out the anti scald mechinism as to freely turn the valve handle to check if there would be any change in the pressure and there was not. There is a sink next to the shower that the hot and cold lines are fed to from the shower( the sink is past the point of where the shower is fed from on the same lines) The sink is right with the pressure it has and I have checked the cartridge and valve body for any signs of wear and debris, is it a bad cartridge?