Wet Sprinkler Systems

1
Wet Sprinkler Systems

• Identifying components of, and inspection and
  testing procedures.

2
Wet sprinkler systems.

• Sprinkler systems save lives and conserve
  property if they work the way they are designed
  and intended to work.
• If they are not properly maintained and inspected
  they may not work the way you want them to when
  you want them to.
• Being properly educated on these systems allows
  you to properly inspect and test them and also to
  verify that they have been properly inspected and
  tested.

3
Wet sprinkler systems.

• A wet pipe sprinkler system has automatic
  sprinklers attached to pipes with water under
  pressure all the time.
• When a sprinkler head is activated by heat this
  causes water to flow out of the sprinkler head
  and onto the fire.

4
Wet sprinkler systems

• Our station is equipped with a wet sprinkler
  system that we are responsible for testing,
  otherwise we do not need to test sprinkler
  systems, but we do need to verify that they have
  been properly tested when we do our inspections
  as part of a building inspection. The actual
  testing of the system falls onto the owner of the
  building or there tenant if that is part of the
  contract they have worked out.

5
Terminal objective.

• Given a lesson on proper testing and inspection
  procedures of wet sprinkler systems, the
  firefighter will explain the proper
  testing/inspection procedure of said system in
  accordance with the NFPA 25- Standard for the
  Inspection, Testing, and Maintenance of water
  based fire protection systems with 100 accuracy.

6
Enabling objective.

• Given a review of wet sprinkler system components
  the firefighter shall identify the various
  components of a wet sprinkler system in
  accordance with Delmar Firefighters Handbook NY
  edition with 100 accuracy.

7
Previous assignment

• You should have read pages 314-329 in the
  firefighters handbook on protective systems to
  re-familiarize yourself with the components of a
  sprinkler system.

8
Safety Information.

• If you are working with overhead obstructions or
  any particulars when checking sprinkler systems
  Hardhats, safety glasses, and gloves should be
  worn.
• If you are using a ladder to check higher level
  components proper safety procedures for ladders
  should be followed.

9
Safety Information

• Watch out for wet floors around sprinkler systems
  whether it be because of leaks or from testing
  procedures.
• If you must turn a valve that is difficult to
  turn get someone to help you turn it so that you
  dont injure yourself.

10

• Today we are going to go over the components of a
  wet sprinkler system and proper testing and
  inspection procedures of said system.

11
System Overview
12
Water Supply to System
Butterfly style control valve with tamper switch.
Water Supply
13
Sprinkler Control Valve
Sprinkler Control Valve. OSY with tamper switch.
http//www.vfpfire.com/projects/images/shemya-isla
nd/wet-system.jpg
14
Sprinkler Valve.
Sprinkler valve or wet valve.
www.vanguardfire.com/images/stories/sprinkler/spri
nkler_wet_valve.jpg
15
Sprinkler Valve operation
16
Fire Department Connection
Internal Siamese valve.
17
Pressure Gauges
System Pressure Gauge
Supply Pressure Gauge
http//www.vfpfire.com/projects/images/shemya-isla
nd/wet-system.jpg
18
Retard Chamber, Pressure Switch
Pressure Switch
Retard Chamber
http//farm5.static.flickr.com/4068/4387390289_6af
378b10f_m.jpg
19
Water Motor Gong
Water Gong Bell
Sprinkler System Drain
20
Water Motor Gong
Pressure switch
Water Motor
Gong Bell
Retard Chamber
http//www.lifetechfire.co.uk/products/sprinklers/
wetalarm_pic.jpg
21
Sprinkler Riser
Sprinkler Riser
http//farm5.static.flickr.com/4068/4387390289_6af
378b10f_m.jpg
22
Flow Switch
http//www.viking-uk.com/Viking_img/brochure/p32_r
isermanifold_1.jpg
http//www.firesense.com.au/images/flow_switch.jpg
23
Sprinkler heads
24
Sprinkler Heads
http//www.vikinggroupinc.com/databook/sprinklers/
standard/sr/stcov/080106.pdf
25
Inspectors Tests
http//www.reliablesprinkler.com/pdfs/products/AGF
TESTDrain.pdf
26
Sprinkler System Activation
27

• Those are the various components of a wet
  sprinkler system and their purpose and operation
  during a system activation.

28
Inspection Procedures

• When you do a building inspection you want to
  check several things on a sprinkler system
• Check to make sure the building owner has
  inspection records showing they conform with NFPA
  25.
• Table 5.1 refers to sprinkler system components
  inspection and testing Schedule.
• Table 13.1 refers to valves and valve components
  inspection and testing schedule.

29
(No Transcript)
30
Sprinkler Inspection Schedule
31
Sprinkler Test Schedule
32
Valve Inspection Schedule
33
Valve Inspection Schedule Cont.
34
Valve Test Schedule
35
Inspection Procedures

• When performing a walk through inspection check
  the following things.
• Outside valve is open and locked if there is one.
• FDC Clean and usable?
• Inside control valve is open and secured. (if
  valves are not secured do they have tamper
  switches)
• Pressure gauges in good condition and reading the
  same?
• Hydraulic nameplate present?

36
Inspection Procedures

• Continued
• Check all valves, connections, piping and heads
  to see that they are free of damage.
• If sprinkler head is bulb type check to see that
  fluid is still in bulb
• Minimum distance from head to storage 18.
• Check the wall box to make sure enough spare
  sprinklers are present.

37
Testing Procedures

• When testing the system follow the NFPA 25
  Schedules on table 5.1 and 13.1 for testing
  sprinkler components and valves.
• Mechanical water flow (water gong) devices shall
  be tested quarterly.
• Vane type (flow switch) and pressure switch type
  shall be tested semiannually
• These tests shall be performed by opening the
  inspectors test connection.

38
Testing Procedures

• Continued
• Main drain tested annually be sure to record the
  static and residual pressures on the system.
• Control valves operated annually and are in
  proper position?
• Control valve tamper switch alarms received? Test
  semiannually.

39
Quiz Time

• Take 15 minutes to take quiz then hand in to me
  when completed.

40
Terminal Objective.

• Given a lesson on proper testing and inspection
  procedures of wet sprinkler systems, the
  firefighter will explain the proper
  testing/inspection procedure of said system in
  accordance with the NFPA 25- Standard for the
  Inspection, Testing, and Maintenance of water
  based fire protection systems with 100 accuracy.

41
Enabling Objective.

• Given a review of wet sprinkler system components
  the firefighter shall identify the various
  components of a wet sprinkler system in
  accordance with Delmar Firefighters Handbook NY
  edition with 100 accuracy.

42
Summary

• You should now know the various components of a
  wet sprinkler system and the proper procedure to
  inspect and test those components. This should
  make it much easier to inspect and determine
  problems with such systems.

43
Assignment

• Perform an inspection of the sprinkler system in
  the station with your shift officer observing as
  you tell them what you are doing.
• Perform a full test of the sprinkler system with
  your shift officer observing to verify proper
  testing.

44
Thank You All

• Thank you all for coming and learning about
  sprinklers.
• Hopefully some of what I showed you today will
  assist you with your work involving sprinkler
  systems.
• I will be available after completion to answer
  any questions you might have.
• BE SAFE!!