pdf MJC 20mm - heat activated, Single Outlet
![MJC 20mm - heat activated, Single Outlet](https://gwsprinkler.com/joomlatools-files/docman-images/MJC/20mm%20MJC%2012mm%20bulb.png)
GW Multiple Jet Controls (MJC’s) are for use in sprinkler or waterspray systems where it is required to operate small groups of open sprinklers or waterspray nozzles simultaneously.
Each MJC contains a fragible glass bulb sensitive to heat. The bulb is pre-loaded at the factory to hold a Nickel/Silver plate against a brass seal which provides a water and air tight seal. The application of heat bursts the bulb releasing the disc and allowing water to flow.