I'm reading his problem as the hot water he's getting is not hot enough, not that the volume is insufficient? Maybe some clarification by the OP?
Bill
Nodwell RN110 out moose hunting. 4-53 Detroit, Clark 5 spd, 40" wide tracks, 10:00x20 tires, 16,000# capacity, 22,000# weight. You know the mud is getting deep when it's coming in the doors.