Breaking Top Featured Content:
This is the inside of an Insinkerator SST-FLTR instant hot water dispenser.
The dispenser feeds depressurized water into the left nozzle, and the tank pushes hot water up the center nozzle. A third 1/8″ tube runs from the dispenser to the nozzle circled on the right, but I can’t figure out what that tube does. The dispenser works without it, and I can’t detect any pressure or suction on either the tube or the nozzle when running water through the tank.
So what does the right nozzle and tube do?