Flusso 150.4371 3-Way Diverter Shower Valve & TrimThe TVH. 4371 is a 3 Way [3 output] diverter valve with shared outputs and has integrated volume control functionality. The valve has a flow rate of 8. 0 GPM @ 60 PSI. Handle Operation The handle is used to control the volume and also water diversion through the 3 outlets. The positions of the valve which activate each output port are as follows: Position 0 No water flow Position 1 Output 1 Active Position 2 Output 2 Active Position 3 Output 2 And