UL 789
Standard for Indicator Posts for Fire-Protection Service

DETAILS
Edition Number:10SCC Approved:--
Edition Date:2004-01-09DOD Approved: --
Price Code:CANSI Approved: 2018-09-04
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover indicator posts, including wall, underground, and above ground types, for use in operating valves of the inside-screw pattern and for indicating the position of the gates in such valves. Indicator posts are primarily intended for use with valves controlling water supplies to sprinkler, deluge, water spray, foam, and standpipe systems used in private fire service where connections enter buildings.

    1.2 Requirements for the installation and use of the indicator posts covered by this standard are included in the following Standards of the National Fire Protection Association:

    a)     NFPA 11,  Low Expansion Foam and Combined Agent Systems;

    b)     NFPA 13,  Installation of Sprinkler Systems;

    c)     NFPA 14,  Installation of Standpipe and Hose Systems; and

    d)     NFPA 24,  Installation of Private Fire Service Mains.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
        • CONSTRUCTION
          • 5 Barrels
          • 6 Caps
          • 7 Operating Stems
            • 7.1 General
            • 7.2 Underground types
          • 8 Position Indicators
            • 8.1 General
            • 8.2 Rotating target mechanisms
            • 8.3 Vertically moving target mechanisms
          • 9 Extension Rods
          • 10 Handwheels and Wrenches
          • 11 Locking and Sealing
          • 12 Polymeric Materials and Nonmetallic Parts
        • PERFORMANCE
          • 13 Strength of Parts Test
          • 14 Elastomeric Parts (Except Gaskets) Test
          • 15 Polymeric Parts Tests
            • 15.1 Air oven aging test
            • 15.2 Light and water test
            • 15.3 1000 cycle operation test
        • MARKING
          • 16 Details
    • Appendix A