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Potter Signal 1144406 VSR (VSR-F) 6" Vane Type Waterflow Alarm Switch with Retard

Model #12875
Starting at:
$107.00
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Product Description

Notes: Free shipping on this item when buying box quantities. This item ships direct from the manufacturer the following day if ordered by 1:00 EST. For copper or plastic pipe, use model VSR-CF.

Warnings: This device must be tested in accordance with testing instructions. It should not be used as the sole initiating device to discharge AFFF, deluge, or chemical suppression systems. It is not intended to be used in explosive environments.

Operating Temperature: 40°F/120°F (4.5°C/49°C)

The Model VSR-F is a vane type waterflow switch designed for use on wet sprinkler systems. It can also be used as a sectional waterflow detector on large systems. The two single pole, double throw (SPDT) switches are activated when a flow of 10 gallons per minute or more occurs downstream of the device. A 10 GPM flow condition is necessary to overcome the adjustable pneumatic retard period. The unit’s die-cast housing has a cover with tamper-resistant screws that require a special key to remove.

Key Features:

  • For use with steel pipe
  • 450 PSI service pressure (31 bar)
  • 18 FPS (5.5 m/s) maximum surge
  • 10 GPM (38 LPM) minimum flow rate for alarm
  • Die-cast housing
  • Non-corrosive sleeve installed
  • NEMA 4/IP54 Rated Enclosure; Sealed against moisture
  • Tamper resistant screws
  • Optional tamper switch kit (Stock No. 0090018)
  • Suitable for indoor or outdoor use
  • Adjustable instantly recycling pneumatic retard
  • 2 SPDT snap action switches
  • UL Listed; FM and LPC approved
  • May be mounted on vertical or horizontal pipe


Compatible With:

  • UL, FM and LPC steel pipe schedules 10 through 40
  • Sizes 2” through 8” (50mm through 200mm)


Service Use:

  • Automatic Sprinkler NFPA-13
  • One or two family dwelling NFPA-13D
  • Residential occupancy up to four stories NFPA-13R
  • National Fire Alarm Code NFPA-72

Downloadable extras

  1. Specs
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