Cotherm - 14 Replacement Unvented Water Heater Immersion Element - 2 1/4 Boss - ELE-14-IN-800-210 14 Element 2 1/4 (2.25 inch) Boss Comes Complete With Gasket Contains 7 Cotherm TSDR0702 Rod Thermostat PLEASE NOTE REMOVAL OF THE THERMOSTAT CAP IS STRICKLY FORBIDDEN. TAMPERING WITH THE CAP, OR RETURNING TO US WITHOUT THE SCREWS, WILL INVALIDATE YOUR WARRANTY.