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Viking Introduces New 5.8 K-Factor Residential Flat Plate Concealed Sprinkler with Lower Pressure Requirements

Tuesday, August 28, 2018 - 3pm


Hastings, Michigan, USA – The Viking Corporation, a global leader in fire protection and life safety systems, has added a new 5.8 K-factor residential concealed pendent sprinkler to its leading Freedom® residential product line. Because of its larger K-factor, the Model VK498 delivers the required flows for an NFPA 13 residential system (0.1GPM/FT2) at lower starting pressures. The new glass bulb sprinkler is ideal for mid-to-high rise residential structures, allowing installers to lower their pressure requirements while also using a more economical ½” CPVC sprinkler head adapter.

The Model VK498 features a flat cover plate and is well-suited for residential applications where a concealed appearance is desired. The new sprinkler is one of four in Viking’s Freedom® residential line with a 5.8 (84) K-factor, joining the VK472 pendent, the VK460 horizontal sidewall, and the VK490 flat concealed sidewall. (The VK498 replaces the previous Viking Model VK474.)

According to Darren Palmieri, Viking’s Residential Market Manager, “Viking’s broad line of residential sprinklers provides contractors with lower flows and pressures that translate into better hydraulic performance in mid-to-high rise residential applications. Viking can offer a residential design approach that often results in fewer sprinklers at lower cost and smaller pipe sizes for easier installation and lower maintenance costs.”

Available in both 155°F (ordinary) and 200°F (intermediate) temperature ratings, the Model VK498 has three cover plate styles (standard diameter, large diameter, and square). In addition to nine standard finishes and unlimited custom color options, the sprinkler is also available with an ENT finish for installation in certain environments where corrosion is a concern. The VK498 has a ½” NPT thread, and uses the same installation wrenches as Viking’s Mirage® commercial concealed pendent sprinkler.



Viking is a global leader in the manufacture and distribution of innovative fire protection and life safety systems.  For nearly 100 years the company’s products and services have protected lives and property worldwide from the devastating effects of fire.  For more information on Viking’s complete line of fire protection products and services, please visit or call 800-968-9501.