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SP20172 FV Sensor Kit W/ Cap Plug Rheem/ Ruud Water Heaters

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Product Description

Brand New

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Replacement FVIR Water Heater Flammable Vapor Sensor.

Chemi-resistive Flammable Vapor Sensor 
The 25VS flammable vapor sensor from Therm-O-Disc® is an integral part of the Flammable Vapor Ignition Resistance (FVIR) systems offered by the North American water heater manufactures on residential power vent models. 
The sensor is designed to detect the presence of a specific concentration of gasoline vapors. The proprietary conductive polymer sensing film expands in the presence of flammable vapors significantly changing sensor resistance. 

This Sensor Is Used In These Brands


Flammable Vapor Sensor Used In These Brands

  • 25VS
  • 7203
  • 13070E
  • BRADFORD WHITE 2394556000
  • RHEEM AP134473 SP20172
  • RUUD
  • SEARS 9005968


•Before removing any wiring or performing any repairs this unit must be unplugged or control damage will result.
•The flammable vapor sensor will indicate to the control module the presence of vapor, this is a one time use sensor 
which is located below the outer door to the combustion chamber. The integrity of the sensor can be checked at 
room temperature and should provide a normal operation range of 13KΩ – 25 KΩ when checked
• < or = 7,000 KΩ replace the sensor
• > or = 95,000 KΩ replace the sensor

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Product Reviews

  1. Factory Part FAST Shipping HOT WATER AGAIN 5 Star Review

    Posted by on 25th May 2015

    Very pleased with this factory part original best deal and fastest delivery will be back

  2. Exact fit extremely fast ship hot water again 5 Star Review

    Posted by on 21st Apr 2015

    I wasted so much time on the internet if i came here first this would be my best fastest deal and yes i will be back

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