How do you know if gas valve is on or off?
How Do You Tell If the Gas Supply Is On or Off? The simplest way to tell if the gas supply is off is to check the position of the gas shutoff valve lever. If the lever is perpendicular to the supply pipe, the gas supply is switched off. If it's parallel to the line, the supply is on.
The valve itself may have simply worn out or may be damaged due to basement seepage or submersion. Alternately, one of the electronic gas ignition components or a glitch in the safety circuit may be to blame. If your furnace has a standing pilot light, the thermocouple could be worn out.
Before turning on your gas meter, be sure to turn off all gas appliances and pilot lights. To turn on your gas supply, rotate the valve handle into the vertical 'on' position. After turning on the gas connection, you should see the gas meter dial move and then stop within fifteen seconds.
Think of a clock
If you ever have to shut off the water or gas off in your home, always remember that a shut-off valve closes clockwise and opens counter-clockwise. Older shut off valves may need a little muscle to turn.
The gas meter and gas service shutoff valve is usually located on the side or in front of the building. If the building has a breezeway, it could be located there.
The safety valves shall be reset at a pressure at least 2.5% below, but not more than 5% below the safety valve set pressure. The 5% limit is increased to 10% for valves having a body seat bore less than 32 mm and/or having a set pressure of 2 bar gauge or less.
Electrical resistance from the glow bar blocks current to the gas valve, making sure that the valve closes. This decreases as the temperature increases. When the bar reaches a particular heat, enough to ignite the gas, it allows sufficient electricity through to open the gas valve.
A gas line can become blocked with dirt or other debris; insects; tree roots; or even water. Alternatively, a gas line can develop a bad dent or kink in the line that blocks the flow of gas through it. The most obvious sign of a natural gas blockage is gas-powered appliances that no longer work properly or at all.
To turn the water back on, either turn the gate valve counterclockwise or turn the ball valve a quarter-turn counterclockwise. Warning: Turn the valve slowly to turn on the water to your home. Opening the valve too quickly can result in damage to the pipes in your home.
When it comes to which way you should turn the valve, keep in mind the old saying “righty tighty, lefty loosey.” In other words, turning a valve clockwise, or to the right, will restrict the flow of water while turning it counterclockwise, or to the left, will allow water to flow.
Which direction is a valve open?
If the handle on top is parallel to the valve, it's open. Likewise, if the handle is perpendicular to the top, the valve is closed. Common places you might find a ball valve are in irrigation and in sites where you need to control water supply from one area to another.
There is a shut-off valve running parallel with the pipe, usually located about 6 to 8 inches above the ground. Take a 12-inch or larger adjustable wrench, and turn the valve 1/4 turn in either direction, until the valve is crosswise to the pipe.
Do not shut off the gas unless you smell gas, hear gas escaping, see a broken gas line or suspect a gas leak. If you shut off the gas, there may be a considerable delay before PG&E can turn your service back on.