Used in the following models: CB 495, CW 495, CS 495, CB 645, CW 645, CS 645, CB 745, CW 745, CS 745, CB 985, CW 985, CS 985, CB 1255, CW 1255, CS 1255, CB 1435, CW 1435, CS 1435, CB 1795, CW 1795, CS 1795, CB 2065, CW 2065, CS 2065, CH 750, CF 750, 750, CH 650, CF 650, 650, CH 500, CF 500, 500, CH 400, CF 400, 400, CH 300, CF 300, 300, Lochinvar Parts, Pool Heater Parts