Wet Pipe Systems

Wet pipe sprinkler systems are systems employing automatic sprinklers attached to a piping system containing water and connected to a water supply so that water discharges immediately from sprinklers opened by heat or fire. Wet pipe sprinkler systems are installed more often than all other types of fire sprinkler systems.

Wet Alarm Valve

The Model AV-1-300 Alarm Check Valves are intended for use in wet pipe (automatic sprinkler) fire protection systems. They may be installed vertically or horizontally, and they are designed to automatically actuate electric and/or hydraulic alarms when there is a steady flow of water into the system that is equivalent to the discharge rate of one or more sprinklers. The valves are UL/FM approved.

    Butterfly Shut-Off Valve

    The Model JPL Butterfly Valves are indicating type valves designed for use in fire protection systems where a visual indication is required as to whether the valve is open or closed. They are used, for example, as system, sectional, and pump water control valves. The valves are UL/FM approved.

      Wet Alarm Valve Accessories

      The Water Motor Alarm Gong and the Retarding Chamber are optional accessories that can be used in the Wet Sprinkler System. The Water Motor Alarm Gong is hydraulically operated and is used to sound a local alarm in case of water flow. The Retarding Chamber is used in situations where excessive water pressure occurs in order to collect excess water from the Alarm Valve and feed water back into the main drain before activating the alarm.


        Various Types of Sprinklers that are used in Wet Pipe Systems. The sprinklers contain a glass bulb filled with a fluid which expands when exposed to heat. When the rated temperature is reached, the fluid expands sufficiently to shatter the glass Bulb, allowing the sprinkler to activate and water to flow. The Sprinklers are available in different temperatures and responses for all types of applications.