Control Valves and Drains

Because the sprinkler system connects to a water supply, the system needs some way to control flow when replacing a sprinkler or making alterations to piping. In many instances, occupancy changes require those types of modifications.

There are two categories of control valves:

• indicating valves
• nonindicating valves

» Next: Indicating Control Valves

Indicating control valve in closed position

A common type of indicating control valve is an outside stem and yoke valve, shown here in an underground valve pit