Holdly SP20172 Flammable Vapor FV Sensor Kit AP13447-3-25VS for Rheem/Ruud/Richmond FVIR Water Heaters

Holdly SP20172 Flammable Vapor FV Sensor Kit

The Holdly SP20172 kit is a compact, purpose built replacement part designed for FVIR water heaters from Rheem, Ruud, and Richmond, with compatibility extended to select AO Smith and Bradford White models. It centers on a Flammable Vapor Sensor (AP13447-3 25VS) and essential mounting components, offering a practical way to address vapor sensing without adding external power demands. The sensor and its accompanying hardware are designed to be installed in minutes, helping you keep hot water flowing with confidence.

What’s included and where it fits

• Flammable Vapor Sensor AP13447-3 25VS
• Cap Plug
• Wire Tie
• Guidance on model compatibility and installation

Compatibility snapshot

The kit is designed for Rheem, Ruud, and Richmond FVIR water heaters and also works with certain AO Smith and Bradford White models. If you are unsure about fit, share your unit model and we will help verify compatibility before you install.

How the sensor behaves in real life

• The sensor film responds quickly to gasoline vapors by changing its electrical resistance, signaling vapor presence to the control system.
• When vapors are detected, the control module can adjust or interrupt gas flow to the heater, contributing to safer operation within the system’s configuration.

Power and installation dynamics

• No external power is required; the sensor uses the control circuit’s existing power to read resistance changes and trigger the appropriate response.
• Replacing the sensor can help restore normal heater function if vapor related issues were interrupting operation, potentially returning hot water availability sooner.

Practical usage scenarios

In typical home settings such as garages, basements, or laundry rooms where vapors may be present, this kit provides a practical, self contained solution. It emphasizes quick response, straightforward installation, and a streamlined path back to regular hot water delivery without promising guaranteed outcomes.