Armex Test and Drain Valve is a type of ball valve used in fire systems, especially for testing whether the system is working or not. It is installed in the zones deemed necessary on the system from the fire alarm valves to the sprinkler installation. The ball used in the Test and Drain Valve can be rotated by the valve handle through the shaft and consists of 3 positions as test, drain and closed. In the test position, the ball hole is an orifice of the diameter determined by the smallest diameter sprinkler in the zone. With this orifice, it is possible to calculate and test the amount and time of water to be discharged from the sprinkler if needed. The drainage position allows it to be used as a purge valve when desired. The flow through the sight glass on both sides of the Test and Drain Valve can be observed.