Potter VSR-2.5


2.5″ Flow Switch

Availability: Please Call for Lead Time

  • Factory New
Brand: Potter FireAlarm.com Part #: 80939 Category: Manufacturer Part #: VSR-2.5 Tags: ,


The Potter VSR is a vane type waterflow switch with non-corrosive insert for use on wet sprinkler systems. It is UL Listed and FM Approved for use on steel pipe. Models available for pipe sizes 2″ through 10″. The Potter VSR series is the industry standard for flow switches for fire sprinkler systems and is compatible with the widest range of pipe schedules (5 through 40) in the industry as well as all necessary listings and approvals for installation worldwide. Please see the individual data sheets for specific information about a particular model and size, including the VSR-10 for use on 10″ pipe.


Weight 1.00 lbs



  • Assembled in USA
  • 0-90 second field replaceable time delay retard
  • Easy to read retard time delay adjustment knob
  • UL Listed models for 2″-6″ steel pipe schedules 5 through 40
  • UL Listed and FM approved models for 2″-8″ steel pipe schedules 10 through 40
  • Two SPDT (form C) contacts
  • Weatherproof
  • Easy to read wire terminal designations


VSR; Vane Type Waterflow Alarm Switch W/ Retard
Potter – Data Sheet


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