cut off the gas pipe valve, or the circuit breaker in the main panel for an electric heater
Electric heater is always turned off at circuit breaker, but heater receives no heat and tank can freeze. To prevent freezing while on vacation, turn off electricity, open cover(s) on front of water heater, use a screwdriver and turn down thermostat(s). Thermostats will be marked with temperature so when you return from vacation, rotate temperature back to original setting, or save money by setting temperature lower. Be sure to put insulation and covers back on each time so thermostats read correct temperature.
Gas heater: Depends on why you want to turn off water heater.
Going on vacation, simply rotate large dial on front of gas control valve until "vacation" is at top. This will keep temperature at 50 degrees F and prevent freezing. Then when you return from vacation, rotate dial back to original position. Take photo of dial so you remember original position since markings on valve are not specific. The advantage of rotating dial is that pilot light stays lit.
If you want to turn gas completely off, then the pilot light will go out, and the tank receives no heat. To turn off gas, go to gas control valve where large temperature-setting dial is located. There is a 1/2" - 3/4" gas line that connects to side of gas control valve. The gas line can be flexible pipe or rigid black pipe. Follow the gas line a short distance and you will find a brass shut-off valve. The brass valve has a rectangular piece on top where a crescent wrench fits. Rotate the rectangular piece 1/4 turn. Once the rectangular piece is perpendicular to the direction of the gas line, then the valve is off.
To safely shut off your hot water heater, locate the power source and turn off the electricity or gas supply. Next, turn off the water supply to the heater. Allow the water heater to cool down before attempting any maintenance or repairs.
No. The Main is source of water for that as well.
To shut off the water to the water heater, locate the shut-off valve on the cold water supply line leading to the heater. Turn the valve clockwise to close it and stop the flow of water to the heater.
To properly shut off the water supply to the water heater, locate the shut-off valve on the cold water pipe leading to the heater. Turn the valve clockwise to close it and stop the flow of water to the heater.
To shut off a water heater, locate the power source (usually a switch or circuit breaker) and turn it off. Additionally, you can turn off the gas supply if your water heater is gas-powered. It's important to follow the manufacturer's instructions and safety precautions when doing this.
To turn off your water heater, locate the shut-off valve on the cold water supply line leading to the heater. Turn the valve clockwise to shut off the water flow to the heater.
To turn off your water heater, locate the shut-off valve on the cold water supply line leading to the heater. Turn the valve clockwise to shut off the water supply to the heater.
To turn off the water to the water heater, locate the shut-off valve on the cold water pipe leading into the water heater. Turn the valve clockwise to shut off the water supply.
If you have your own water heater there should be a shut off at the heater. If not I would look under the kitchen sink. There may be shut off valves at each fixture. If there is a central water heater in the basement, there would be a shut off to each unit.
To turn off the water supply to the water heater, locate the shut-off valve on the cold water pipe leading to the heater. Turn the valve clockwise to shut off the water flow.
To turn off the water to the hot water heater, locate the shut-off valve on the cold water supply line leading to the heater. Turn the valve clockwise to shut off the water flow.
To turn off your water heater, locate the shut-off valve on the cold water supply line leading to the heater. Turn the valve clockwise to shut off the water flow to the heater. Additionally, you can switch off the power to the water heater by flipping the corresponding breaker in your electrical panel.