What is the difference between Solid Jet nozzle and Master Stream nozzle fitted on monitors?

Solid jet nozzles are the most commonly used nozzles on fixed monitors in the country. These nozzles project the water in the form of a solid jet stream for long range firefighting, and it is not possible to alter or change this pattern.

Master stream nozzles project water in the form of a hollow jet, which has a better range as compared to solid jet streams, hence these are being preferred nowadays. The other advantage is that the pattern can be changed from hollow jet to narrow fog (for vapour dispersal/ cooling) or wide fog (radiant heat protection).

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