You should see a shut off valve on the gas line somewhere near the heater.
Gas hot water heater shut off valve.
Locate the water supply feed into the water heater which will typically be found on the wall just above the top of the water heater.
Turn the gas valve 1 4 turn until the lever is perpendicular to the gas line to shut off the gas.
A full open valve is one that does not restrict the flow of water when open all the way.
These valves allow you to stop the flow of gas to your dryer oven furnace water heater or gas fireplaces to make repairs or new installations without cutting off gas to your entire home.
Shut off the gas then disconnect the gas line from the water heater.
A shut off valve is required on the cold water supply pipe to water heater.
Turn off the water to the water heater.
Drain the water heater using an electric pump and garden hose.
Gas shut off valve your water heater runs on natural gas in most cases.
It s imperative that you be able to shut the gas off to the water heater.
A ball valve like the one shown above which utilizes a center ball with a round tunnel cut out of its center and a gate valve which uses a plate that descends across the pipe cross section to.
If you re leaving the house for an extended period or you hear hissing coming from the heater you should also turn off the gas valve in the gas supply line.
When it is turned off the handle will be at a 90 degree angle to the pathway of the pipe itself.
The mechanism protects you your home and the water heater.
Again handle parallel to the line means gas is flowing perpendicular means it s cut off.
Check to make sure that the water heater has turned off.
If you believe you have a gas leak at the water heater you can turn off the gas at the dedicated gas shut off valve on the gas line leading to the water heater.
It shuts off the power or gas supply automatically to the water heater to prevent the temperature rising any higher.
Steps for installing a water heater shut off valve.
Here s how the residential edition of the florida building code fbc and the international residential code irc state it.
Most service valves are single lever ball valves.
Shut off the gas valve.
If it s defective it won t send a command to the heater elements to switch off when they reach the desired temperature.
A handle parallel to the pipe indicates an open valve.
A faulty thermostat can trigger the reset button.