Wet Sprinklers

7/29/2019 Wet Sprinklers

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Wet Sprinkler Systems

Identifying components of, and

inspection and testing procedures.


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Wet sprinkler systems.

Sprinkler systems save lives and conserveproperty if they work the way they are designedand intended to work.

If they are not properly maintained and inspectedthey may not work the way you want them towhen you want them to.

Being properly educated on these systems allows

you to properly inspect and test them and also toverify that they have been properly inspected andtested.


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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.


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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 theowner of the building or there tenant if that is

part of the contract they have worked out.


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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 with100% accuracy.


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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.


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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.


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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.


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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.


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Today we are going to go over the

components of a wet sprinkler system and

proper testing and inspection procedures of

said system.


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System Overview


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Water Supply

Butterfly style

control valve

with tamper

switch.

Water Supply to

System


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Sprinkler Control Valve

Sprinkler Control

Valve. OS&Y with

tamper switch.

https://reader009.{domain}/reader009/html5/0420/5ad9a733ebd20/5ad9a73c19454.jpg


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Sprinkler Valve.

www.vanguardfire.com/images/stories/sprinkler/sprinkler_wet_valve.jpg

Sprinkler valve

or wet valve.


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Sprinkler Valve operation


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Fire Department Connection

InternalSiamese

valve.


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Pressure Gauges

https://reader009.{domain}/reader009/html5/0420/5ad9a733ebd20/5ad9a73

System Pressure

Gauge

Supply Pressure

Gauge


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Retard Chamber, Pressure Switch

http://farm5.static.flickr.com/4068/4387390289_6af378b10f_m.jpg

Retard Chamber

Pressure Switch


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Water Motor Gong

Water Gong Bell

Sprinkler System Drain


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Water Motor Gong

http://www.lifetechfire.co.uk/products/sprinklers/

wetalarm_pic.jpg

Pressure switch

Water Motor

Gong Bell

Retard Chamber


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Sprinkler Riser

http://farm5.static.flickr.com/4068/4387390289_6af378b10f_m.jpg

Sprinkler Riser


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Flow Switch

http://www.firesense.com.au/images/flow_switch.jpghttp://www.viking-

uk.com/Viking_img/brochure/p32_risermanifold_1.jpg


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Sprinkler heads


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Sprinkler Heads

http://www.vikinggroupinc.com/databook/sprinklers/standard/sr/stcov/080106.pdf


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Inspectors Tests

http://www.reliablesprinkler.com/pdfs/products/AGFTEST&Drain.pdf


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Sprinkler System Activation


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Those are the various components of a wet

sprinkler system and their purpose and

operation during a system activation.


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Inspection Procedures

When you do a building inspection you want

to check several things on a sprinkler system

1. Check to make sure the building owner has

inspection records showing they conform withNFPA 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.


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Sprinkler Inspection Schedule


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Sprinkler Test Schedule


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Valve Inspection Schedule


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Valve Inspection Schedule Cont.


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Valve Test Schedule


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When performing a walk through inspection

check the following things.

1. Outside valve is open and locked if there is one.

2. FDC Clean and usable?

3. Inside control valve is open and secured. (if valves

are not secured do they have tamper switches)

4. Pressure gauges in good condition and readingthe same?

5. Hydraulic nameplate present?


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Continued

6. Check all valves, connections, piping and heads

to see that they are free of damage.

7. If sprinkler head is bulb type check to see thatfluid is still in bulb

8. Minimum distance from head to storage 18.

9. Check the wall box to make sure enough sparesprinklers are present.


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Testing Procedures

When testing the system follow the NFPA 25

Schedules on table 5.1 and 13.1 for testing

sprinkler components and valves.

1. Mechanical water flow (water gong) devices

shall be tested quarterly.

2. Vane type (flow switch) and pressure switch type

shall be tested semiannually3. These tests shall be performed by opening the

inspectors test connection.


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Testing Procedures

Continued

4. Main drain tested annually: be sure to record the

static and residual pressures on the system.

5. Control valves operated annually and are inproper position?

6. Control valve tamper switch alarms received?

Test semiannually.


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Quiz Time

Take 15 minutes to take quiz then hand in to

me when completed.


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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 inaccordance with the NFPA 25- Standard for

the Inspection, Testing, and Maintenance of

water based fire protection systems with100% accuracy.


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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 FirefightersHandbook NY edition with 100% accuracy.


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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 easierto inspect and determine problems with such

systems.


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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.


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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!!

Date post:	14-Apr-2018
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Wet Sprinklers

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