Caleffi’s Thermosetter is an adjustable thermal balancing valve used for automatic balancing of recirculation loops in domestic hot water systems. The internal thermostatic balancing cartridge automatically modulates flow to make sure there is a constant temperature in the recirculation piping system. The Thermosetter can be adjusted from 95° to 140° F with a locking adjustable knob. An integral dry well holds a slide-in temperature gauge for local indication or a sensor for remote temperature sensing.