Model 1040FF Alarm Check Valve is a wet pipe sprinkler system water supply check v alve that makes possible the installation of spri nkler systems in buildings not subject to fre ezing temperatures. It is designed so that water pressure in the piping system will hold back water pressure at the valve until a sig nificant flow of water occurs such as a spri nkler is activated.

 The Alarm Check Valve serves as a check valve by trapping pressurized water above the clapper and preventing reverse flow from sprinkler piping.

The valve is trimmed with a water bypass line. The bypass line allows pressure surges to enter the system and to be trapped above the alarm check valve's. clapper without the clapper lifting and causing false alarms.

When a significant sustained flow of water occurs, such as from an open sprinkler, the alarm valve's clapper lifts and allows water to enter the system. Simultaneously, water enters an intermediate chamber, which allows the water to activate an alarm either through an optional water motor alarm and/or through a water pressure alarm. These alarms continue to sound until the flow of water is stopped.

The valve should be installed vertically on wet-pipe sprinkler systems with constant.