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Viking Residential Fire Sprinkler 3.0K Brass Pendent 155F | VK4700 - Lead Free!

Viking VK4700 Residential Fast Response Brass Pendent Fire Sprinkler activates at 155F (68C) to defend ordinary-hazard residential occupancies against fire. This UL-listed fire sprinkler features a 3.0K orifice and a 1/2" (12.7 mm) NPT connection.
Part Number Construction Connection Orifice
VK4700WH155 Brass Finish, Brass Frame, And Brass Or Phosphor Bronze Deflector 1/2" (12.7 mm) NPT 3.0K
Temperature Rating Maximum Working Pressure Approvals and Listings Availability
155F (68C) 175 PSI (12 BAR) UL, ULc, NYC, NSF Usually ships within 48 hours


Viking VK4700 155-Degree Residential Pendent Fire Sprinkler (Lead Free)

Viking VK4700 Residential Fast Response Brass Pendent Fire Sprinkler delivers powerful, affordable fire suppression in ordinary hazard residential occupancies such as homes, apartments, dormitories, and hotels.

Using a heat-activated 3mm glass bulb, this automatic fire sprinkler opens when ambient temperatures reach 155F (68C), supporting rescue and evacuation efforts by lowering ambient temperatures.

When and how should VK4700 residential fire sprinklers be used?

The 3.0K orifice makes efficient use of available water supplies in home fire sprinkler systems and small residential systems. Viking's Freedom Residential Pendent Lead Free Sprinklers are designed to be unobtrusive, fast-acting, and capable of providing coverage of up to 16 feet by 16 feet (4.9m x 4.9m). 

The Viking Model VK4700 has a 3.0 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 lead-free design in compliance with the Reduction of Lead in Drinking Water Act, and is composed of a:

  • Brass frame
  • Brass screw
  • Spring sealing assembly made with nickel alloy and PTFE tape.

What are the advantages of 155-degree fire sprinklers?

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. The Viking Model VK4700 is also a suitable choice for many:

  • College dormitories
  • Condominiums
  • Nursing homes

Which standards does this lead-free, 3.0K fire sprinkler comply with?

With a maximum working pressure of 175 PSI, this pendent sprinkler hangs from above-ceiling piping and may be installed and used in accordance with NFPA 13, NFPA 13R, NFPA 13D and local fire code. Each Model VK4700 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.


Click here to view the data sheet for the Viking VK4700 Residential Fast Response Brass Pendent Fire Sprinkler.

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