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>>> Type: Flammable Vapor FV Sensor Kit

>> Replacement Part Number: Fit for Rheem SP20172.

>> Widely Applicable: Fit for Rheem Ruud, Fit for Richmond water heaters, also fit for AO Smith and fit for Bradford W specific white water heaters models.

>> Flammable Vapor Sensor Film: Capable of quickly reacting to gasoline vapors in the surrounding air of the water heater, causing a change in resistance based on the vapor concentration

>> Function: Upon detecting a leak, it quickly triggers the control module to shut off the gas supply to the water heater and prevent ignition, reducing safety risks

>> No external power required: It relies solely on the small amount of power provided by the control circuit to read the sensor's resistance changes and perform subsequent processing

>> Package Includes: 1x Flammable Vapor Sensor (AP13447-3), 1x Cap Plug (AP13450-3), and 1x Wire Tie as pictured.