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VK478 - Quick Response Flush Pendent Sprinkler (K5.6)

VK478 - Quick Response Flush Pendent Sprinkler (K5.6)

Viking Quick Response Flush Pendent Sprinkler VK478 is a small high-sensitivity  fusible element sprinkler designed for installation on concealed pipe systems where  the appearance of a smooth ceiling is desired.

The two-piece design of the sprinkler and ceiling ring allows installation and testing of the sprinkler prior to ceiling installation. The ceiling ring allows for up to 5/8” (16 mm) of vertical adjustment and can be removed and re-installed, allowing access above removable ceiling panels without shutting down the sprinkler system and removing the sprinkler.

Technical Details

K Factor: 






Part Number: 


VK Number: 


Additional Information: 

NOTICE: The product details indicated below are for general reference only and may vary based on the specific product approval and/or application. Always verify product details with the technical data sheet and consult with the Authority Having Jurisdiction (AHJ).

Max Pressure: 

175 psi (12 bar)

Response Type: 


Occupancy Type: 

Light Hazard, 
Ordinary Hazard

Thread Size: 

1/2" NPT (15 mm BSP)

Min Spacing: 

Per Standards / Listings

Max Spacing: 

Per Standards / Listings