1-800-968-2871

24-Hour Emergency Service

1-800-968-2871
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Let us know how we can help you and a Fire Pros representative will contact you within 24 hours.

How do fire sprinkler systems work?

Most sprinkler heads contain a small bulb with a colored liquid inside. This bulb acts as a plug to prevent water from escaping out of the sprinkler. The heat from a fire causes this liquid to quickly expand. Once the pressure in the vial gets too high, the bulb bursts and releases the water behind it.

The liquid inside the bulbs comes in a variety of colors, and each color represents the temperature required to activate the sprinkler:

  • Orange – 135°F
  • Red – 155°F
  • Yellow – 174°F
  • Green – 200°F
  • Blue – 286°F
  • Purple – 360°F
  • Black – 440°F

Since the fire sprinklers are activated by heat, there is no risk of accidental activation of your fire sprinkler system by smoke or dust in the air. That said, the bulbs are very fragile and any tampering could cause them to go off. If a sprinkler head gets accidentally knocked off (by a forklift, truck, repairman, etc.), there’s going to be lots and lots of water flowing through that sprinkler head until the system is shut down.

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Local Reviews

Fire Pros, LLC Rated 4.9 out of 5 stars based on 3389 customer reviews

Map of Waterford Township, MI

Super easy, very professional




Review of Fire Pros, LLC


Map of Saline, MI

Show up hours before they should have.




Review of Fire Pros, LLC

Jim Is great.


Map of Hartland, MI

service




Review of Fire Pros, LLC

very good service, on time, efficient, accommodating!


Map of Shelby Charter Township, MI

Great Service




Review of Fire Pros, LLC

Appreciate Alex’s thoroughness. Easy to work with.


Map of Ravenna, MI

Great friendly service




Review of Fire Pros, LLC

Sean was very professional & friendly


Map of Grand Haven, MI

Great Service




Review of Fire Pros, LLC


Map of Grandville, MI

Prompt and friendly




Review of Fire Pros, LLC


Map of Grand Rapids, MI

David




Review of Fire Pros, LLC

Very nice, knowledgeable, personable. Thank you. He's a good guy. Now that you call for appointments things are great. In the past you'd just show up and it was horrible. So thank you for calling first and setting an appt.


Map of Kentwood, MI

Pipe relocation




Review of Fire Pros, LLC

Great guys to work with. Required minimal instruction.


Map of Farmington, MI

the technician was very knowledgeable and helpful




Review of Fire Pros, LLC

keep up the good work your team is awesome.


Awesome work




Review of Fire Pros, LLC


GREAT SERVICE




Review of Fire Pros, LLC

Sean did an excellent inspection. He was thorough and efficient.


Exceptional Service




Review of Fire Pros, LLC

The gentleman that came out was great, was able to get what we needed fixed. Very timely.


waited while I was on a phone call to explain an issue with my sprinkler heads




Review of Fire Pros, LLC


Punctual , explained answers to my questions politely




Review of Fire Pros, LLC


Alarm system check




Review of Fire Pros, LLC

They knew their stuff. Taught me above and beyond what they were expected to and they were friendly.


Annual Review - Pump Station




Review of Fire Pros, LLC

They were able to get the work done. Showed me the system and how to test it. Independently problem solved. What more could you ask?


great service - he was early but it accomodated both of us




Review of Fire Pros, LLC

great company!


Store director




Review of Fire Pros, LLC

Everything went really well and the tech was very friendly and professional


Great Service




Review of Fire Pros, LLC

Very professional and thorough


John H.

John H.

Sprinkler Emergency Service Call

Near N Nicolet St, Mackinaw City, MI 49701
Tyler H.

Tyler H.

SD 2ND FLOOR: Div 3: AV circuit open, likely severed line in attic. Smoke detector missing, - repair This quote is for an alarm technician to have the time to trouble shoot the reason why there is an open on the horn strobe circuit ."Fix and repair when found " Also in this quote is for a replacement smoke detector and test.

Near 3rd St, Sunfield, MI 48890
Mark S.

Mark S.

Near General Motors Rd, Milford Charter Township, MI 48381
Jared J.

Jared J.

Near Southfield Rd, Southfield, MI 48076
Alex R.

Alex R.

Corrected Deficiency from recent inspection And Updated 2020 Report ***All Systems Normal and Reset ***

Near E Grand Blvd, Detroit, MI 48207
John  R.

John R.

Near N Marketplace Blvd, Lansing, MI 48917
Jim S.

Jim S.

1/14 Requested by and confirmed with Nassar.   Requests after lunch rush as usual.  km Portable Extinguishers and Kitchen Suppression Inspection Annual Fire Extinguisher Inspection (2)ABC's (1)K-Class Semi-Annual Kitchen Suppression System Inspection PyroChem PCL-460 (2)500 links (3)360 links (9)Nozzles Deficiency: Number of Systems failed : 1 Deficiency: Number of Extinguishers Left at Job: 1 Deficiency for PCL 460 rear wall: Improper protection over grill. Deficiency for PCL 460 rear wall: Gyro machine not completely under hood and un protected. Deficiency for PCL 460 rear wall: Electric non fuel source on gyro does not de energize upon fire system actuation. Gyro is plugged in outside of hood with extension cord. Deficiency: K-Class fire extinguisher is out of hydro date.

Near S Main St, Adrian, MI 49221
Gary B.

Gary B.

***MUST HAVE PO ON JOB*** Annual Fire Extinguisher Inspection of 150 units ***MUST HAVE PO ON JOB*** Monthly Fire Extinguisher Inspection - 150 units

Near Hagen Dr SE, Grand Rapids, MI 49548
Robert W.

Robert W.

Near Highland Rd, Hartland, MI 48353
Alex R.

Alex R.

Completed Annual Fire Alarm inspection for 2021 (MS-10UD-7 Only)

Near Ford Rd, Dearborn, MI 48128
David H.

David H.

Near S Bridge St, Linden, MI 48451
George S.

George S.

Near Highland Rd, Waterford Township, MI 48327
Chris W.

Chris W.

Near 26 Mile Rd, Shelby Charter Township, MI 48316
John H.

John H.

Portable Extinguishers Inspection

Near 3 1/2 Mile Rd, Sault Ste. Marie, MI 49783
Mike R.

Mike R.

Deficiency for SD AUDITORIUM CEILING LIGHTING MEZZ: Smoke alarm located above the cat-walk above the stage in auditorium mounted to the ceiling is damaged and, giving a no answer trouble on the Simplex FACP. Jim Hicks stated they have had a lot of roof work a lot of pounding right above there and there is water on stage floor within 1 to 2 feet of smoke detector. **I am unable to get to that smoke detector now for model number but, all other smoke detectors on this site are 4098-9714**

Near Sanford St, Muskegon Heights, MI 49444
George S.

George S.

Near S Main St, Clarkston, MI 48346
John  R.

John R.

Near E Washington St, Coldwater, MI 49036
Mike R.

Mike R.

Mike to meet new maint supervisor and show panels, how to check, how to reset. Calling CMS etc. While onsite verify that signals are coming in properly- Dawn mentioned getting messages from CMS that they were not.

Near Sanford St, Muskegon Heights, MI 49444
Robert W.

Robert W.

Near N Main St, Milford Charter Township, MI 48381
David H.

David H.

Near State Rd, East Lansing, MI 48823
Sean W.

Sean W.

Near Airwest Dr SE, Kentwood, MI 49512
Robert G.

Robert G.

Near S Main St, Lapeer, MI 48446
Mark S.

Mark S.

Near Mound Rd, Warren, MI 48092
Tyler H.

Tyler H.

Annual Fire Alarm Inspection (20 Devices) (Edwards ESL 1500) (Edwards 1527)

Near N Maple St, Saugatuck, MI 49453
Jim S.

Jim S.

1/18 Approved with Steve and head chef...you won't be able to start until after 12;00 Noon due to cooking km Kitchen Suppression Inspection Semi-annual Kitchen System Inspection

Near S State Rd, Saline, MI 48176