116440AC 008 Caleffi 1/2" Pex Expansion Union, ThermoSetter.

Compact Adjustable Thermal Balancing Valve. Low-Lead/Lead Free DZR Brass Body. Complete With: Outlet Check Valve Optional, Temperature Gauge, Union Isolation Valves, Adjustment Temperature Range: 105 – 150 °F Max Fluid Temperature: 195 °F Max. Working Pressure: 230 Psi