shut-off valve
cut-off valve

An automatic cutoff valve had already shut down the water from the main line into this spur, and the geyser had stopped.

If, however, the sight glass reads low and the furnace does not shut off automatically, then a service technician should check out the cutoff valve.

She took the measuring tape and measured the distance from the sink to the cutoff valve at the floor.

A low-water cutoff valve near the boiler automatically shuts off the furnace if the water level drops.

Some of them didn't know yet which way to turn a cutoff valve to stop bad flooding, or even which end of the boat was up.

The shivering workers were isolated, with no visible way to escape or to reach the cutoff valve atop the towering cryogenics tanks.

He was trying to get past the jet to the cutoff valve . . . but the ladder buckled!

He kept vigil as Alex worked his way toward the cutoff valve, hauling himself hand over hand.

For improved efficiency, the Curlew's engine was equipped with Sickle's patented cutoff valve.

We have to get to the cutoff valve.