How is a sprinkler wedge used to stop flow from an activated sprinkler?

• A. Tap a wedge into place between the orifice and the deflector
• B. Push two wedges together from opposite sides between the orifice and the deflector
• C. Insert the wedge into the orifice and drive it into place with a striking tool
• D. Tap two wedges into place above and below the deflector

Answer: (B)

The important idea is that the sprinkler wedge is used to interrupt the water path at the sprinkler head by wedging in the gap between the orifice (where water comes out) and the deflector (which directs the spray). Pushing two wedges together from opposite sides fills and tightens the space in that gap, creating a pinch that stops the flow from the activated sprinkler. This method provides a reliable, mechanical seal without forcing water through the orifice or disturbing other parts of the system, making it the correct technique for temporarily stopping discharge during salvage or overhaul work. A single wedge, or placing wedges above or below the deflector, wouldn’t reliably block the flow or could damage components, and driving a wedge into the orifice itself isn’t how the device is intended to function.