Used in the following models: WB 51, WB 81, WB 106, WB 151, WB 211, KB 80, KB 105, KB 150, KB 210, KB 285, WB 50, WB 80, WB 105, WB 150, WB 210, KB 81, KB 211, KB 106, KB 286, KB 151, Lochinvar Parts, Hydronic Heater Parts, Lochinvar, Lochinvar, Lochinvar, Knight, Floor Standing KB, Wall Mount WB & WH