March 10, 2026
Most FDCs use standard NH/NST threads—but some don’t! QRFS explains the different fire hose and FDC threads and sizes used in various jurisdictions.
August 14, 2025
Smoke and CO detector testers are essential for verifying that alarm systems function properly. But know the shelf life of smoke and CO cartridges!
July 30, 2025
Air maintenance devices are essential components of dry and preaction sprinkler systems. Learn how they work and fit into these systems.
January 31, 2024
Wall hydrants look similar to FDCs but flow water the other way. Learn how each works, when they’re needed, the maintenance requirements, and more.
January 31, 2024
Wall hydrants look similar to FDCs but flow water the other way. Learn how each works, when they’re needed, the maintenance requirements, and more.
March 16, 2022
An OS&Y valve is a type of gate valve used in sprinkler and standpipe systems as a control valve. Read this guide to when and why they are used.
January 19, 2022
System Sensor fire sprinkler supervisory devices are now manufactured by Safe Signal. Learn why the name changed—but little else!
January 11, 2022
Restaurant fires are more common than you might think, but they are usually minor, and fire protection systems do their job well. Read up on the stats and some examples.
December 8, 2021
Learn how a single fire sprinkler in a home garage controlled a fire, saving property and lives—plus why fire sprinklers aren’t in many residential garages.
September 29, 2021
Learn how a working sprinkler system in a senior community stopped a cooking fire in its tracks, saving lives and property.
June 8, 2021
QRFS explains the difference between tamper switches and supervisory switches, plus other types of fire sprinkler system sensors.
October 6, 2020
Learn when to use indicating valves on fire protection systems and how NFPA standards governing these devices have changed.
