Shut off valve F49BR Fire Powerball Butterfly sprinkler control valves provide for easy system shutoff to facilitate repair and maintenance. Shut off valve Fire Powerball Butterflies are operated with a slow closing 1/4 turn anti-water hammer valve. The valve should always be in the open position when the system is active. Tamper switches signal movement of the valve from the full open position to an alarm control panel, and to auxiliary equipment such as an indicating light or audible alarm in the area of the valve installation.
Read Less