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Repair The Gas Shut Off Valve [2012-04-18]

 

Most water appliances, such as faucets, dishwashers and washing machines, have shut-off valves. A Gas Shut Off Valve is placed on a water line to allow you to shut off the water supply to one appliance without shutting off the water supply to the entire house. The valves do occasionally wear out, necessitating that you remove the old valve in order to install a new one.
1 Close the shutoff valve all the way. Tighten the packing nut one eighth turn with an adjustable wrench to see if the valve will stop leaking. The packing nut is directly under the lever or circular handle. On newer valves, the leak usually stops. If it does not, the packing washer--directly under the packing nut--will have to be replaced.
2 Shut off the water supply to the Stop Valve. If you're repairing the main shutoff valve, have the city shut off your water at the city shutoff valve. Remove the handle or lever from the valve stem; usually this is done by removing the screw in the handle or lever.
3 Loosen and remove the packing nut with the adjustable wrench. Pull off the old washer and replace it with a new one. Put the packing nut back on, but don't tighten it too much. Replace the handle or lever.
4 Turn on the water supply and open the water valve all the way. If the valve still leaks, tighten the packing nut 1/8 inch at a time until it stops leaking.
If you want to know more,please enter the following link:Pipe Fittings.