Dry Systems

Print Email

A dry system is a specialized system found in areas where piping is subject to freezing temperatures.  This type of system is tied directly into an underground water supply but maintains constant air pressure throughout all of the piping past this supply point.  With sprinkler head activation, the air is dispersed from the activated sprinkler head allowing water to enter the piping and flow through the open sprinkler head.

An ANNUAL dry system inspection consists of testing/inspecting the following components:

  • Water flow alarms
  • Control valve tamper switch alarms
  • Supervisory air alarms
  • Dry valve activation (full flow test every 3rd year)
  • Main drain flow
  • Fire department connection
  • Stock of spare heads
  • Sprinkler heads and piping
  • Sprinkler coverage

A RISER or QUARTERLY dry system inspection consists of testing/inspecting the following components:

  • Water flow alarms
  • Control valve tamper switch alarms
  • Supervisory air alarms
  • Main drain flow
  • Fire department connection
  • Stock of spare heads