Check the listing for details. Heiser 1 1/4” Mechanical Gas Valve 5125H. Condition: New. Listed at 409.99 USD. Heiser 5125H 1-1/4" Mechanical Gas Valve Overview • Application: Designed for use in restaurant and commercial kitchen systems, particularly in conjunction with fire suppression systems. • Gas Compatibility: Rated for both Natural Gas and Liquid Propane. • Functionality: • Mechanical shut-off valve that activates via a regulated release assembly. • Automatically shuts off gas flow to appliances when triggered by the fire suppression system. • Included Components: • Air cylinder • Tubing • Fittings for connection to the release mechanism.