The Outside Screw and Yoke valve in a sprinkler system is used for what?

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Prepare for the Jones and Bartlett Firefighter II Test. Study with detailed questions and expert explanations to boost your confidence for the exam!

Multiple Choice

The Outside Screw and Yoke valve in a sprinkler system is used for what?

Explanation:
Outside Screw and Yoke valves serve as the main control valves for the sprinkler system. Their job is to admit water into the system so the piping can be pressurized and the sprinklers can operate. When opened, water flows into the system; when closed, the flow is stopped and the system is isolated. The outside screw and yoke design allows you to see the valve’s position from outside—the stem and yoke indicate open or closed status. This valve is a positive shut-off and does not function as a pressure-relief device or as a flow regulator. So the primary purpose is to admit water into the sprinkler system, allowing flow.

Outside Screw and Yoke valves serve as the main control valves for the sprinkler system. Their job is to admit water into the system so the piping can be pressurized and the sprinklers can operate. When opened, water flows into the system; when closed, the flow is stopped and the system is isolated. The outside screw and yoke design allows you to see the valve’s position from outside—the stem and yoke indicate open or closed status. This valve is a positive shut-off and does not function as a pressure-relief device or as a flow regulator. So the primary purpose is to admit water into the sprinkler system, allowing flow.

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