A sprinkler system has two parallel mains with branch lines

A sprinkler system has two parallel mains with branch lines connecting to each main at a single point through the use of riser nipples (see isometric view below). Water can flow in multiple separate paths from the supply to the sprinklers. What type of sprinkler system is this? O A. Tree system OB Looped system ° C. Gridded system Antifreeze system E. Multi-purpose system

Solution

Gridded system, in this system adjacent branch lines looped throughout the system (as shown in Figure). This provides a multitude of paths for the water to flow through, thereby taking the best hydraulic advantage of the available water supply.