OEM Gas Valve, Conversion Kit (Non-UL) 426890

The Ansul 426890 is a gas valve conversion kit used to adapt existing gas valves for compatibility with ANSUL R-102 restaurant fire suppression systems. This kit is explicitly Non-UL listed: meaning it does not carry a UL listing on its own and is intended for specific adaptation applications where the overall system configuration has been evaluated for use with this conversion. Before purchasing or installing this kit, confirm with your AHJ (Authority Having Jurisdiction) and a licensed ANSUL fire suppression contractor whether this non-UL conversion kit is acceptable for your specific installation under local code requirements.

Gas valve conversion kits are used in situations where an existing gas valve in a commercial kitchen installation needs to be adapted to connect to the ANSUL R-102 system's mechanical cable actuation network allowing the existing valve to be pulled closed by the R-102 system's trip mechanism when the system activates. This can be relevant in retrofit installations where replacing the entire gas valve is impractical but adapting it to work with the ANSUL system is feasible.

The non-UL status of the 426890 is an important consideration for code compliance. Most AHJs require UL-listed components throughout a fire suppression system. If a UL-listed gas valve replacement is required, the appropriate ANSUL UL-listed mechanical gas shutoff valve series (055598 through 055610) should be used instead. The 426890 should only be specified by a licensed ANSUL fire suppression contractor who has confirmed its acceptability for the specific installation. Available through authorized ANSUL distributors.

This product is explicitly Not UL Listed. This is not a minor technical detail it has direct implications for code compliance. NFPA 96 and most local fire codes require fire suppression system components to be listed by a recognized testing laboratory. Before specifying or installing the 426890, you must confirm with your AHJ and a licensed ANSUL fire suppression contractor that this non-UL conversion kit is acceptable for your specific installation. If a UL-listed solution is required, use the appropriate ANSUL UL-listed mechanical gas shutoff valve from the 055598–055610 series instead. Do not install this kit without a proper code compliance review.

When would someone use this instead of a standard UL-listed gas valve?

The 426890 conversion kit may be used in retrofit situations where replacing an existing gas valve entirely is impractical. For example, where the existing valve is embedded in complex piping that would be expensive to modify. In those cases, adapting the existing valve for R-102 actuation compatibility via the 426890 may be the most practical solution, provided the AHJ approves its use. Your licensed ANSUL contractor can assess whether the 426890 is the right approach for your specific retrofit situation or whether full gas valve replacement with a UL-listed unit is required.