Fire Sprinkler Systems

Types of Fire Sprinkler Systems

Wet Pipe Fire Sprinkler Systems – the most commonly used type of Fire sprinkler, wet pipe Fire sprinkler systems are a type of sprinkler system that uses automatic sprinkler heads attached to a piping system that comes pre-charged with water from the Fire pump. With this type of Fire sprinkler system, the Fire sprinkler heads open in response to heat and water is discharged instantly after the heads open.


Wet pipe Fire sprinkler systems are found in most typical once buildings and provide a standard level of Fire protection.


Dry Pipe Fire Sprinkler Systems – a dry pipe Fire sprinkler system uses Fire sprinkler heads that are attached to pipes Filled with pressurized air as opposed to water.When the sprinkler heads open, the air is released and a valve is opened allowing water to ow through the pipes and out the open sprinkler heads.While this causes a slight delay in water discharge, it is useful in buildings where water could freeze if kept in the pipes.

Dry pipe fire sprinkler systems are less common than wet pipe fire sprinkler systems because they are more expensive and more complicated. However, they are very useful in certain situations, such as in unheated buildings, parking garages and refrigerated coolers where temperatures get cold enough that water coul freeze in the fire sprinkler pipes.

Deluge Fire Sprinkler Systems – a deluge firre sprinkler system uses open fire sprinkler heads attached to a piping system which is itself connected to a water supply by a valve. When the smoke or fire alarm goes on, this valve open and sends water through the pipes and sends water through all of the sprinkler heads at once.Deluge fire sprinkler systems are used in applications where fires could spread quickly unless large quantities of water are delivered as quickly as possible.

Pre-Action Fire Sprinkler Systems – pre-action fire sprinkler systems are basically a combination of a deluge fire sprinkler system and a wet pipe fire sprinkler system– water enters the pipes via a valve and ows through the sprinkler heads when they are activated by heat. They are commonly used in spaces containing expensive and valuable equipment that could be damaged by the accidental triggering of the sprinklers.

How to Keep Your Sprinkler Safe
Between Inspections

Between fire sprinkler inspections, there are a number of things you can do on your own to keep your fire sprinkler safe:

  • Never paint yourfire sprinkler heads
  • Never hang anything from your sprinkler heads
  • Never stack anything within 18 inches of your
    sprinkler heads
  • Always report damage to your fire sprinkler
    system to a certified fire protection company.
  • Always make sure your control valves are in the
    open position

Fire Sprinkler Inspection

When was the last time you had fire sprinkler inspection?

Fire sprinklers are a critically important part of every fire protection system, but they need regular inspection in order to ensure that they will be able to keep you protected at all times.
If you want to schedule a fire sprinkler inspection in call UCD today!

Annual Fire Sprinkler Inspections

The NFPA requires that you have annual fire sprinkler inspection in order to keep your building safe. In addition, you should have fire sprinkler inspection every time you:

  • Add a backow preventer or water meter to your building’s plumbing system.
  • Significantly change the occupancy, layout or use of your building.
  • Face changes in public water supply, such as a water shortage.

Fire Sprinkler Inspection Process

  • Visual inspection from the floor for proper orientation, support and clearance of all sprinkler heads and system piping that are readily viewable and accessible.
  • Main drain tests are performed to verify proper water volume and pressure is available for the sprinkler system. Results are recorded.
  • Lubricate valves.
  • If connected to the building alarm system, alarm and supervisory devices are checked tomake sure proper annunciation and notification is indicated.
  • Flow switches are tested by flowing water from the inspectors test connection.
  • Tamper switches are tested by exercising the valve through the full range of motion and verifying that signals are received at the fire alarm control panel.
  • Check fire department connections for proper caps and being unobstructed.
    Check system gauge calibration date and verify the water pressure is adequate.
    Check for proper signage on valves.
  • Inspect spare head box for proper inventory of spare sprinkler heads and wrench.
  • Verify that all valves are in the proper position and sealed or supervised
    If the system is monitored, verify signals are received at the central monitoring station.
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