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Preaction Systems

Preaction Fire System Inspection Services in Wayne, Washtenaw, and Oakland County, MI

A Preaction Fire System is a sprinkler system that employs closed automatic sprinklers connected to a piping system that contains air or nitrogen that may or may not be pressurized. In the sense of dry pipe and functionality, it is similar to a dry-pipe sprinkler system.

A preaction fire system is generally installed in areas where water is a last resort. A typical installation of a preaction system is in a computer or server room. This system is tied directly into an underground water supply or downstream of the building’s wet system. Most preaction systems maintain air pressure in the piping for supervisory (controlled) reasons. This system requires at least one prior event or activation before water is introduced into the piping. Activation could be one of a few things, like a smoke detector, which will send a signal to the preaction valve and activate water flow. The next activation occurs at a sprinkler head, which sends the signal to open up the water flow.

Preaction System Fire System Suppression Inspection & Repairs Southeast Michigan - preation1

Best Situations for the Use of Preaction Fire Systems

Sometimes there are situations where you don’t really want anything to get wet from a wet sprinkler system, like in a computer server room. That is a case where preaction systems are preferred and used. These are highly effective suppression systems that aim at controlling and protecting your computer server rooms from fire, using water as a last resort.

This type of fire suppression system and equipment are used at data centers to prevent accidental water discharge onto the server racks and terminals, unless absolutely necessary. Museums also use preaction systems as art, and antiquities can be destroyed nearly as much with water as fire.

Preaction System Fire System Suppression Inspection & Repairs Southeast Michigan - preaction2

Installation and Repair Services Available with Arbor Inspection Services

When you realize that 98% of inspections result in service being needed, or even a small part replaced, you understand that fire suppression inspections should not be overlooked. One broken or worn out part can render a system inoperable and result in a fire suppression system failure. As with all fire suppression systems, you can count on us to repair and replace parts on the same day that your inspection takes place. We have parts and components on hand to make sure your inspection is complete.

Contact Us for Fire Protection

 

An Annual Preaction Fire System inspection tests and inspects:

  • Water flow alarms
  • Control valve tamper switch alarms
  • Supervisory air
  • Mechanical activation of preaction valve
  • Main drain flow
  • Fire department connection
  • Stock of spare heads
  • Sprinkler heads and piping
  • Sprinkler coverage

A Riser or Quarterly Preaction Fire System inspection tests and inspects:

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