Wrap a 1 1/2-inch-wide, 16-gauge-thick metal strap (A) around the top of the water heater and bolt the ends together.

Do the same about 1/3 of the way up the side of the water heater. Take four lengths of EMT electrical conduit, each no longer than 30 inches.

Flatten the ends. Bolt one end to the metal strap (B). Screw the other end to a 2-inch by 4-inch stud in the wall using a 5/16-inch by 3-inch lag screw.

Be sure a flexible pipe (C) is used to connect the gas supply to the heater.