The 116 Series THERMOSETTER from Caleffi North America is an adjustable thermal-balancing valve used for automatic balancing of recirculation loops in domestic hot water systems to speed hot water delivery, reduce water waste, and save pumping energy. The internal thermostatic-balancing cartridge automatically modulates flow to ensure a constant temperature in the recirculation piping system. It is adjustable from 95 to 140 degrees F with a locking adjustment knob. An integral dry well holds a slide-in temperature gauge for local indication or a sensor for remote temperature sensing. An optional check valve protects against circuit thermo-syphoning. For applications that require thermal disinfection and protection against Legionella, a self-contained or remote control bypass cartridge is available. 414/238-2360; www.caleffi.com.