Water Heater Bracket for Joints Gas water heater bracket kit. Minimal assembly required. 21 in. x 21 in. x 18 in. Galvanized steel. Fits 30-50 gallon water heaters. For use with all residential water heaters. Features: Water Heater Bracket for Joints Specifications: Dimensions: 0.1 x 0.1 x 0.1 inches. Height (inches): ): 175 Width: 2110 Weight: 10 lbs.