Water Flow Alarm For Sprinkler System

Waterflow detectors monitor the flow of water to sprinkler heads.

Water flow alarm for sprinkler system. Systems installed in accordance with nfpa 13d 2010 edition equipped with smoke detectors installed in accordance with nfpa 72 2010 edition. An alarm is a required component of every sprinkler system having more than 20 sprinklers. When this valve is opened it allows water to flow from the supply to the pressure switches and bells. Pressure switches indicate a discharge from a sprinkler.

They are designed to sound a continuous alarm while a sprinkler system operates. There is an alarm test valve that is connected to the supply water before the alarm valve. For example at 35 pounds per square inch psi the 5000 series rotor using the 3 0 nozzle will use 3 11 gallons per minute gpm. At different pressures the sprinkler head and nozzle will consume different amounts of water.

What is nfpa requirements on the installation of the following alarm devices for water systems such as sprinkler and deluge systems. To perform the five gallon bucket test you place the five gallon bucket beneath the flow of water and time it while it fills up. If connected to a central alarm notify the fire department and or central station about the test. The trim on the alarm valves allows for testing of the pressure type flow switch without flowing water throughout the entire system.

Unmonitored sprinkler systems are required to have an audible water flow alarm on the exterior of the building in an approved location. Globe s model wm water motor alarm is a hydraulically operated outdoor alarm for use with fire protection systems. Allow the water to flow for about 60 seconds or until the alarm sounds. How to perform the water flow test.

Supervisory switches help prevent tampering or incorrect setting of valve controls. Flow switch downstream of alarm check valve deluge valve. This water powered system eliminates the need for an electrical alarm and will operate even if electrical power is lost. All three also come in explosion proof versions for hazardous environments.

To find out your flow rate or gallons per minute gpm you can use a flow meter or you will need to perform a five gallon bucket test from the spigot you plan on connecting the garden hose and sprinkler to. The viking water motor alarms are mechanical devices actuated by a flow of water. Locate the inspector s test valve and slowly open so that the valve is in line with the pipe.