Viking™ Institutional Quick Response Pendent (VK426) Fire Sprinkler Head
(Escutcheon Sold Separately)
This item must be installed with an approved Viking™ Escutcheon.
Refer to the datasheet for additional information.
Sprinkler Identification Number (SIN): VK426
This Viking™ Flush Institutional Pendent Fire Sprinkler is a standard coverage flush pendent sprinkler, activating at 165F (73C) with a 5.6 K-Factor, and is rated for Light and Ordinary Hazard occupancies. Each pendent head features heat-sensitive fusible link assembly, standard 1/2 in. NPT threads, and a brass frame with copper deflector.
This is a quick response, standard coverage, institutional sprinkler with a maximum working water pressure of 175 PSI. The VK426 Institutional Sprinkler features a tamper-resistant design, making it a safe and effective choice for use with concealed piping in various institutional mental health occupancies, correctional facilities, or other settings where flush, tamper-resistant sprinklers may be required.
Using a heat-activated fusible link assembly, this automatic fire sprinkler opens when ambient temperatures reach 165F (73C), drenching the area surrounding a fire to keep it in its place of origin. The VK426 is installed flush using one of Viking™’s 3 in. or 4 in. escutcheon plates, leaving exposed only a small portion of the fusible link assembly to ensure the timely activation of the fire sprinkler. Refer to the manufacturer data sheet for installation instructions with the approved Viking™ escutcheon(s).
Viking™ Flush Institutional Fire Sprinkler (VK426) Sprinkler Head Listings and Approvals
Each institutional sprinkler is made by Viking™, a global leader in fire protection manufacturing for nearly 100 years. When installed properly, this VK426 fire sprinkler head maintains listings and approvals from cULus (Category VKKW). Refer to the datasheet for listings and approvals in specific temperatures and/or applications.
The Viking™ Institutional Pendent Sprinkler VK426 is designed for NFPA 13. Apply the listed areas of coverage and minimum water supply requirements as shown in the Approval Chart on Page 8 of the datasheet. This pendent sprinkler head has a maximum working pressure of 175 PSI (12.1 BAR) and connects to fixed fire protection systems (wet, dry, deluge, or pre-action systems).
Viking™ Institutional (VK426) QR Pendent Sprinkler Installation and Other Information
During installation be aware that over tightening will cause permanent damage to the 1/2 in. NPT threads and/or the fire sprinklers themselves. Use the manufacturer approved installation wrench and tighten to a maximum torque of 14 ft-lb (19 N-m). Refer to the data sheet for additional installation and storage information.
This Institutional Pendent sprinkler features a Chrome finish and a 165F (68C) temperature.
Available finishes include Chrome, White, and Grey. Temperature options include 165F (68C) and 205F (79C).
Finish and temperature combinations available in the “Options” section at the top of this product page.
The listed VK426 accessories include the approved Viking™ Institutional Wrench (PN. 22847MB) and the approved Viking™ Institutional 3 in. (PN. 23196-) or 4 in. (PN. 23197-) Escutcheon(s). Commonly purchased with fire sprinkler head cabinets and sprinkler shut off tools. These products are available in the “Frequently bought together” products section at the top of this product page.
