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  • Fire Sprinklers
    • Cover Plates
      • Cover Plate Finder
      • Flat
      • Domed
      • Viking Cover Plates
      • Tyco Cover Plates
      • Reliable Cover Plates
      • Victaulic Cover Plates
      • Senju Cover Plates
      • Cleanroom
    • Escutcheons
      • Escutcheon Finder
      • Recessed
      • Adjustable (401)
      • Split Ring (Retrofit)
      • One Piece
      • Institutional
      • Viking Escutcheons
      • Tyco Escutcheons
      • Reliable Escutcheons
      • Victaulic Escutcheons
      • Senju Escutcheons
      • Vaulted Ceiling
      • Extension Tubes
    • Sprinkler Heads
      • Sprinkler Finder
      • Uprights
      • Pendents
      • Concealed Pendents
      • Horizontal Sidewalls
      • Concealed Sidewalls
      • Residential
      • Standard Response (SR)
      • Quick Response (QR)
      • ESFR, EC, & Other
      • Institutional
      • Viking Fire Sprinklers
      • Tyco Fire Sprinklers
      • Victaulic Fire Sprinklers
      • Reliable Fire Sprinklers
      • Senju Fire Sprinklers
    • Head Wrenches
      • Standard
      • Concealed
      • Recessed
      • Cabinet/Plastic
      • Hybrid and Other
    • Sprinkler Accessories
      • Sprinkler Extensions
      • Installation Tools
      • Trim Rings
      • Spare Head Cabinets
    • Guards and Shields
      • Paint Covers
      • Standard Head Guards
      • Heavy Duty Head Guards
      • Water Shields and Baffles
    • Shut off Tools
      • Shutgun
    • System Components
      • Sprinkler Gauges
      • Flexible Drops
      • Drywall Access Doors
      • Pre-Assembled Risers
      • Cleaning Tools
      • Breakable Locks
  • Pipe
    • CPVC Fittings
      • Caps
      • Couplings
      • Adapters and Reducers
      • Elbows
      • Tees
      • Bushings
      • Pipe
      • Crosses
      • Cement
    • Grooved Fittings
      • Couplings
      • Adapters and Reducers
      • Caps
      • Mechanical Tees
      • Tees
      • Elbows
      • Crosses
      • Coupling Grease
    • Black Iron Fittings
      • Bushings
      • Nipples
      • Square Head Plugs
    • Wall Plates
      • Plastic
      • Metal
      • Galvanized
      • Rod Buttons
    • Installation & Cutting
      • Pilot Clamps
      • Hole Saw Blades
      • Sealants and Greases
      • Boltbreakers
      • Tru Drill
      • Paint Markers
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      • Riser Clamps
      • CPVC Hangers
      • Fasteners and Drivers
      • Beam Clamps
      • Swivel Rings
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      • Aluminum Signs
      • Decals and Stickers
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    • Hydrostatic Test Pumps
    • Smoke Detector Testing
      • Smoke Detector Test Kits
      • Smoke Aerosols and Cartridges
      • Smoke Dispensers
      • Sensitivity Testers
      • Scorpion (Mounted)
    • CO Detector Testing
      • CO Detector Test Kits
      • CO Aerosols and Cartridges
      • CO Dispensers
    • Alarm Testing
      • Battery Testing
      • Duct Detector Testing
      • Sound & Voice Testing
    • Other Detector Testing
      • Heat Detector Test Kits
      • Heat Detector Testers
      • Universal Detector Test Kits
      • Detector Testing Equipment & Accessories
      • Removal and Cleaning
      • Batteries and Chargers
      • Access Poles
    • Gauges
    • Flow Testing
      • Flow Test Kits
      • Pitot Gauge Kits
      • Flow Testing Parts
    • Alarm Bells
      • 24V
      • 120V
      • Alarm Bell Accessories
    • Electronic Supervision
      • Flow Switches
      • Pressure Switches
      • Supervisory Switches
  • FDCs
    • Exposed Bodies
      • Angled
      • Straight
    • Concealed Bodies
      • Angled
      • Straight
    • Caps and Plugs
      • Breakable Caps
      • Plug and Chains
    • Snoots and Swivels
    • Identification Plates
      • Round ID Plates
      • Square ID Plates
      • Auto Spkr ID Plates
      • Standpipe ID Plates
      • Combination ID Plates
    • Residential
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    • Butterfly Valves
      • Grooved Butterfly Valves
      • Threaded Butterfly Valves
      • Wafer Butterfly Valves
    • OS&Y Valves
    • Other Control Valves
      • Powerball Valves
      • Gate Valves
    • Shotgun Riser Check Valves
    • Other Check Valves
      • Brass Check Valves
      • In-Line Check Valves
      • Swing Check Valves
    • Angle Valves
    • Testing & Maintenance
      • Pressure Relief Valves
      • Bleeder Valves
      • Three Way Valves
      • Ball Valves
      • Globe Valves
      • Ball Drip Valves
      • Auxiliary Drain Valves
      • Test and Drain Valves
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      • Post Indicator Valve Wrench
      • Valve Wheel Wrenches
    • Valve Trim Kits
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      • Plastic Cap and Chain
      • Brass Cap and Chain
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Codes & Standards

#479 – Fire Sprinkler Hydraulic Calculations: What Happened to Density/Area Curves?

June 16, 2025June 4, 2025 by QRFS
NFPA 13 fire sprinkler hydraulic calculations with no density/area curves

Density/area curves were a major feature of NFPA 13’s fire sprinkler hydraulic calculations—until the 2022 and 2025 editions. Here’s why they were removed and what replaced them.

Categories Codes & Standards Leave a comment

#475 – NFPA 13 2025 Edition: Reviewing Major Changes, Part 2

August 9, 2025April 9, 2025 by QRFS
NFPA 13 2025 changes part 2

Fire protection standards evolve every three years, and NFPA 13 2025 has some big changes. Learn about updates on protecting buildings with sloped and high ceilings.

Categories Codes & Standards Leave a comment

#474 – NFPA 13 2025 Edition: Reviewing Major Changes, Part 1

August 9, 2025March 26, 2025 by QRFS
Changes to NFPA 13 2025 edition

The fire sprinkler industry is constantly evolving. Learn about some major updates in the NFPA 13 2025 edition, including new rules for dry and preaction systems and supplemental sprinklers.

Categories Codes & Standards Leave a comment

#440 – What Are UL Standards for Fire Protection?

August 9, 2025December 6, 2023 by Jason Hugo
What are UL standards for fire protection

UL standards help ensure safe and reliable fire protection equipment. Learn about the process and documents, focusing on UL 199 and fire sprinklers.

Categories Codes & Standards Tags Listings, UL Leave a comment

#415 – A Guide to Key NFPA 25 Changes in the 2023 Edition

February 3, 2025December 7, 2022 by Jason Hugo
NFPA logo

Learn about some of the biggest NFPA 25 changes in the 2023 edition, including rules on antifreeze fire sprinklers, foam fire suppression systems, testing intervals, and more.

Categories Codes & Standards 3 Comments

#414 – Fire Sprinkler Testing Procedures & Replacement in NFPA 25

August 9, 2025November 23, 2022 by Jason Hugo
Old fire sprinkler

Fire sprinkler testing happens decades after installation for most but not all sprinklers. Learn the NFPA 25 testing & replacement rules and what labs assess.

Categories Codes & Standards Tags fire sprinkler testing, NFPA 25 2 Comments

#395 – Fire and Building Codes for Senior Housing and Other Facilities

February 3, 2025October 12, 2021 by Jason Hugo

Learn about the fire code requirements for residential board and care occupancies, including senior housing and other facilities.

Categories Codes & Standards 22 Comments

#379 – Fire Sprinkler Retrofits: An End-User’s Guide to Understanding Systems

February 3, 2025March 2, 2021 by Jason Hugo
Sprinkler in ceiling

Learn about the NFPA standards governing fire sprinkler retrofits and installations and how to read these documents, ID system components, and more.

Categories Codes & Standards 2 Comments

#376 – U.S. vs. Canada Codes: What’s Different and When Does NFPA Apply?

February 3, 2025January 19, 2021 by Jason Hugo
Canada fire codes

Fire protection, building, and life safety codes are unique in Canada. Read a rundown of how NFPA & Canada codes & standards interact—and how these rules are different from the U.S.

Categories Codes & Standards Leave a comment

#374 – The Elements of Fire Sprinkler System Design

August 9, 2025December 22, 2020 by Jason Hugo
Fire sprinkler design

How is a fire sprinkler system created? Learn about the design process, basic math, and system components used for fire sprinkler system design.

Categories Codes & Standards 4 Comments

#373 – California Fire Code: The Essentials of Fire Sprinkler Maintenance

February 3, 2025December 8, 2020 by Jason Hugo
California fire code

What are the fire sprinkler requirements in California? QRFS explains California Fire Code & breaks down the basic inspection, testing & maintenance rules.

Categories Codes & Standards 35 Comments
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