shut-off valve
cut-off valve

Or, at least have a "shutoff valve" by the fuel cell.

It was not simply a matter of finding and closing a nearby shutoff valve, officials said.

To drain the tank, first close the shutoff valve.

Before attempting to replace a supply pipe, close the shutoff valve to stop the water flow.

Before the tank refilled itself, she found the shutoff valve and closed it tight.

There must be a safety feature, a shutoff valve.

After an extensive lesson by Geoff on how to install the shutoff valve.

Before starting any repair, turn off the water by closing the shutoff valves under the sink.

Shut off the toilet water supply at the shutoff valve and flush the tank.

After the riser is hooked up, you can open the shutoff valve to turn the water on.