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Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
cULus Listing Requirements:
Concealed Pendent Sprinkler VK4621 is cULus Listed as quick response for installation in accordance with the latest edition of NFPA 13 for standard
coverage pendent spray sprinklers as indicated below.
For hazard occupancies up to and including Ordinary Hazard, Group II.
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Protection areas and maximum spacing shall be in accordance with the tables provided in NFPA 13. Maximum spacing allowed is 15 ft. (4.6 m).
Minimum spacing allowed is 6 ft. (1.8 m) unless baffles are installed in accordance with NFPA 13.
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Minimum distance from walls is 4 in. (102 mm).
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Maximum distance from walls shall be no more than one-half of the allowable distance between sprinklers. The distance shall be measured
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perpendicular to the wall.
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The sprinkler obstruction rules contained in NFPA 13 for standard coverage pendent spray sprinklers must be followed.
NOTE: Concealed sprinklers must be installed in neutral or negative pressure plenums only.
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to Form No. F_080614 for general care,
installation, and maintenance information. Viking sprinklers are to be installed in accordance with the latest edition of Viking technical data,
the appropriate standards of NFPA, LPCB, APSAD, VdS or other similar organizations, and also with the provisions of governmental codes,
ordinances, and standards, whenever applicable.
FM Approval Requirements:
Viking Concealed Pendent Sprinkler VK4621 is FM Approved as a standard response Non-Storage concealed pendent sprinkler as indicated in the FM
Approval Guide. For specific application and installation requirements, reference the latest applicable FM Loss Prevention Data Sheets (including Data
Sheet 2-0). FM Global Loss Prevention Data Sheets contain guidelines relating to, but not limited to: minimum water supply requirements, hydraulic
design, ceiling slope and obstructions, minimum and maximum allowable spacing, and deflector distance below the ceiling.
NOTE: The FM installation guidelines may differ from cULus and/or NFPA criteria.
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to Form No. F_080614 for general care,
installation, and maintenance information. Viking sprinklers are to be installed in accordance with the latest edition of Viking technical data,
the appropriate standards of NFPA, LPCB, APSAD, VdS or other similar organizations, and also with the provisions of governmental codes,
ordinances, and standards, whenever applicable.
Form No. F_092121
Rev 01
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
DESIGN CRITERIA - UL
(Also refer to Approval Chart)
DESIGN CRITERIA - FM
(Also refer to Approval Chart)
April 2023
STANDARD AND
QUICK RESPONSE
CONCEALED PENDENT
SPRINKLER VK4621 (K5.6)
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