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Viking FREEDOM Residential Fire Sprinkler 4.9K Concealed Pendent 155F | VK494

Viking VK494 Residential Fast Response Concealed Pendent Fire Sprinkler activates at 155F (68C) to defend ordinary hazard residential occupancies against fire. This UL-listed fire sprinkler features a 4.9K orifice and a 1/2" (12.7 mm) NPT connection.
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Part NumberConstructionConnectionOrifice
VK494CP155Brass Frame And Phosphor Bronze Deflector1/2" (12.7 mm) NPT4.9K
Temperature RatingApprovals and ListingsCover Plate Activation TemperatureCover Plate Finish
155F (68C)cULus135F (57C)Choice of White, Ivory, Black, Antique Brass, Brushed Brass, Brushed Chrome, Bright Brass, Polished Chrome, or Brushed Copper. Custom Finishes by Special Order.
Maximum Working PressureAvailability
175 PSI (12.1 BAR)Usually ships within 48 hours

Product Description

Viking VK494 Residential Fast Response Concealed Pendent Fire Sprinkler delivers decorative, competitively-priced defense against fire in ordinary hazard residential occupancies such as homes, apartments, dormitories, and hotels. Using a heat-activated glass bulb, this automatic fire sprinkler opens when ambient temperatures reach 155F (68C), reducing the likelihood of flashover and facilitating safe evacuation. Designed for residential applications, the 4.9K orifice makes efficient use of available water supplies in smaller sprinkler systems.

The included low-profile cover plate mounts flush to nearby walls and is available in a custom finish by special order or in one nine standard finishes, including: white, ivory, black, antique brass, brushed brass, brushed chrome, bright brass, polished chrome, or brushed copper. When temperatures near the ceiling reach 135F (57C), the soldered cover plate detaches, exposing the head of the Viking VK494 concealed pendent fire sprinkler, which activates when temperatures reach 155F (68C).

The Viking Model VK494 has a 4.9 K-Factor and installs with 1/2" (12.7 mm) National Pipe Thread (NPT), used in fire sprinkler systems throughout the United States. This Residential Fast Response Fire Sprinkler features a brass frame, a phosphor bronze deflector, and a copper/brass or stainless steel cover plate. This sprinkler features a "push-on, thread-off" cover plate design, provides up to 1/2" (13 mm) of vertical adjustment, and the cover assembly easily removes to p.

To order the Viking VK494 with custom cover plates, contact us at 888.361.6662 or fill our our contact form.

This 155F (68C) temperature rating strikes a balance between a fire sprinkler that activates too soon, causing accidental discharge, and too late. 155F (68C) Residential Fast Response Fire Sprinklers can be installed to wet and dry pipe fire sprinkler systems, and are preferred for use in one and two-family dwellings, apartments, duplexes, and boarding houses when a low profile is desirable. The Viking Model VK494 is also a suitable choice for installation in many college dormitories, condominiums, and nursing homes.

With a maximum working pressure of 175 PSI (12.1 BAR), this pendent sprinkler hangs from above-ceiling piping behind a decorative cover plate and may be installed and used in accordance with NFPA 13, NFPA 13R, NFPA 13D and local fire code. Each Model VK494 sprinkler is made by Viking, a global leader in fire protection manufacturing for nearly 100 years.

This product is UL-listed, and appropriate for use in fire protection systems when accepted by the authority having jurisdiction. In accordance with NFPA 13, a higher temperature rating may be required when installing a residential fast response fire sprinkler in or near heat sources, unventilated spaces, uncovered steam mains, or uninsulated rooftops. Concealed pendent sprinklers s

Technical Documents

Click here to view the data sheet for the Viking VK494 Residential Fast Response Concealed Pendent Fire Sprinkler.

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