Viking Water Motor Gong | Model F-2 | 8 in. | 07862

SKU:
VKWMAF2
Manufacturer Part Number:
07862

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$610.50

Viking Water Motor Gong | Model F-2 | 8 in. | 07862

Viking Water Motor Gong | Model F-2 | 8 in. | 07862
Viking Water Motor Gong | Model F-2 | 8 in. | 07862
Viking Water Motor Gong | Model F-2 | 8 in. | 07862
Viking Water Motor Gong | Model F-2 | 8 in. | 07862
Viking Water Motor Gong | Model F-2 | 8 in. | 07862
Viking Water Motor Gong | Model F-2 | 8 in. | 07862
Viking Water Motor Gong | Model F-2 | 8 in. | 07862
Viking Water Motor Gong | Model F-2 | 8 in. | 07862

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Viking Water Motor Gong | Model F-2 | 8 in. | 07862
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Overview
  • Requires no electricity (water-powered)
  • Helps first responders quickly identify a lack of pressure in fire sprinkler systems
  • Perfect for NFPA 13 waterflow alarms
  • UL-listed and FM-approved for compliance with leading fire safety standards
  • Made with durable, corrosion-resistant steel and aluminum
  • Shipped from locations throughout the U.S. for fast arrival times
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    • View technical specifications
    • What does this contain?
    • Where are these required or used?
    • How do I assemble this water motor gong?

    What does this water motor gong assembly contain?

    The Viking Model F-2 Water Motor Gong is a fire alarm bell that requires no electricity. This mechanical device sounds when water passes through the 3/4 in. NPT inlet, rotating a striker to produce a 90-decibel alarm.

    This complete water motor gong assembly contains almost everything needed to sound an alarm just add pipes and fittings. Each Viking Model F-2 ships with:

    • A motor assembly with a brass nozzle and a cast-iron housing
    • A striker arm assembly featuring a stainless-steel arm, pin, and washer
    • One 3/4 in. brass strainer for the alarm line
    • One 16-3/4 in. stainless steel drive shaft

    If the wall is less than 3 in. thick, this gong requires an extension mounting cup. If the wall ranges from 14 in. to 30 1/4 in. thick, an extension shaft is needed. Viking also offers a closure plate to protect gongs mounted on uneven walls against nesting birds and other intrusions. To place a special order for these components, call (888) 361-6662.

    Where are these required/used?

    Water motor alarms or electric fire alarm bells are required for any NFPA-13-compliant fire sprinkler system that has more than 20 sprinklers. Most often, Viking's #07862 Water Motor Gong works as a waterflow alarm. These alarms are typically placed on a building's exterior wall, and often guide firefighters to fire department connections (inlets used to supply water to a building's fire sprinkler system).

    How do I assemble and install Viking's water motor alarm?

    For a detailed look at this water motor gong's installation requirements, consult Viking's instruction manual.Typical assembly for the Model F-2 is as follows:

    • Cut a hole no larger than 1 5/8 in. in the building's wall.
    • Cut and thread a 3/4 in. galvanized spacer pipe (used to protect gong components). If Viking's extension mounting cup (sold separately) is used, cut the pipe 2 in. longer than the wall is thick. If no cup is used, cut the pipe 1 in. shorter than the wall is thick.
    • Cut the drive shaft. If using an extension cup, make the shaft 5 3/4 in. longer than the wall's thickness. Otherwise, cut it 2 3/4 in. longer than the wall is thick.
    • File the drive shaft to provide a 3/32 in. (2.4 mm) x 450 chamfer on both corners of both ends.
    • Slide the spacer pipe over the shaft and thread the end of the spacer pipe into the gong support assembly coupling.
    • Slide the closure plate (sold separately) against the gong's back. Secure with a 9/32 in. fastener if needed.
    • Slide the free end of the space pipe into the hole of the support assembly.
    • Slide the wall plate over the free end of the spacer pipe.
    • Remove the thread protectors from the water motor and attach it to the spacer pipe.
    • Attach the gong, flat washer, and label to the gong support with the included 12 in. screw.
    • Connect the water motor inlet to the alarm outlet of a waterflow detection device. Install the 3/4 in. strainer on the line as close to the alarm outlet as possible.

    Specifications

    SKU Viking Part Number Inlet Thread Connection
    VKWMAF2 07862 3/4 in. (19.1 mm) NPT
    Drain Thread Connection Drive Shaft Length Wall Thickness
    1 in. (25.4 mm) NPT 16-3/4 in. (425 mm) Up to 14 in. Thick
    Sound Level at 10 Feet Diameter Optional Accessories
    90 dB 8-1/16 in. Gong Extra-Long Drive Shaft, Closure Plate, Extension Mounting Cup
    Rated Working Pressure Approvals/Listings Availability
    250 PSI Water Working Pressure (WWP/CWP) UL, CUL, FM, LPCB, CE, NYC 219-76-SA Usually Ships Within 48 Hours
    Specifications
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