Cart Mixing Valves Mixing valves protect against thermal shock in hydronic heating systems and scalding in domestic hot water systems. View cart “Sharkbite 24504 1/2″ Thermostatic Mixing Valve” has been added to your cart. Apollo Mixing Valves (8) Danfoss Mixing Valves (18) Sharkbite Mixing Valves (2) Taco Mixing Valves (5) Watts Mixing Valves (7)