Marketing InformationThe Apollo 34C Series Mixing Valves are ASSE 1017 approved thermostatic mixing valves designed for high capacity commercial and institutional ''''point of source'''' applications. Featuring ease of maintenance and ''''Best in Class'''' flow rates, they provide reliable temperature control for large hot water distribution and hydronic heating systems. Patent lb US 6,328,219.Patented ''''Finger Grip'''' Pads for Easy Inline Shuttle MaintenanceMade in USA - ARRA Compliant