Hot and cold isolation kit for thermostatic mixing valve set of two lead-free DZR brass ball valves with integral check valves on inlets and reversible red and blue handles. These straight thread valves are compatible with similarly sized Webstone products, including Air Separators, Differential Pressure By-Pass Valves, Magnetic Boiler Filters, and Thermostatic Mixing Valves. Installers can choose from a variety of kits encompassing the exact valves needed for their installation. Kits include straight and/or angled ball valves, with optional Isolator or Isolator with multi-function drain. Designed for use with water, oil, glycol mix in residential or commercial residential plumbing, commercial plumbing, heating systems. Refer to specification sheets for additional technical information. All Webstone products are backed by a limited lifetime warranty.