{"product_id":"1-4-npt-port-cabin-air-height-leveling-control-valve-kit-for-hadley-mack-volvo","title":"1\/4 NPT Port Cabin Air Height Leveling Control Valve Kit for Hadley Mack Volvo","description":"\u003cstrong\u003eThis Cabin Air Height Leveling Control Valve Kit is a pneumatic control valve assembly with 1\/4\" NPT port compatible with Hadley, Mack, and Volvo air suspension systems.\u003c\/strong\u003e \u003ch2\u003eProduct Overview\u003c\/h2\u003e The cabin air height leveling control valve kit precisely regulates air pressure to maintain consistent ride height in truck cabins. Designed for heavy-duty applications, this valve kit works with Hadley, Mack, and Volvo air suspension setups to keep the cab level under varying loads. The 1\/4\" NPT port provides a standard connection for air lines, making it a direct-fit replacement for worn or leaking height control valves. \u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eStandard 1\/4\" NPT female port threads for reliable air line sealing\u003c\/li\u003e \u003cli\u003eInternal valve mechanism responds quickly to height changes for immediate leveling\u003c\/li\u003e \u003cli\u003eDurable design withstands harsh under-cab environments and road debris\u003c\/li\u003e \u003cli\u003eDirect replacement for leveling valves on Hadley, Mack, and Volvo cabin air systems\u003c\/li\u003e \u003cli\u003eMaintains proper cab height to reduce driver fatigue and protect suspension components\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eHadley cabin air suspension systems\u003c\/li\u003e \u003cli\u003eMack truck models with cab air leveling\u003c\/li\u003e \u003cli\u003eVolvo truck models with cab air leveling\u003c\/li\u003e \u003cli\u003eAny system utilizing a 1\/4\" NPT port for height control valve mounting\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eCommon Uses\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eReplacing a faulty leveling valve on a tractor cabin air suspension\u003c\/li\u003e \u003cli\u003eRestoring automatic cab height adjustment on long-haul trucks\u003c\/li\u003e \u003cli\u003eServicing air-ride systems on vocational trucks with cab leveling\u003c\/li\u003e \u003cli\u003eReplacing a leaking valve to restore proper cab air pressure control\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePort Size:\u003c\/strong\u003e 1\/4\" NPT\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eValve Type:\u003c\/strong\u003e Cabin Air Height Leveling Control Valve\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Brands:\u003c\/strong\u003e Hadley, Mack, Volvo\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e \u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this valve a direct bolt-on replacement for the original Hadley valve?\u003cstrong\u003e A:\u003c\/strong\u003e Yes, the valve is designed to replace Hadley and compatible leveling valves with a 1\/4\" NPT port; mounting bracket compatibility may vary by model.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this kit include gaskets or mounting hardware?\u003cstrong\u003e A:\u003c\/strong\u003e The kit typically includes the valve assembly only; reuse existing mounting hardware and gaskets unless they are damaged.\u003c\/p\u003e \u003cp\u003e\u003cem\u003eProduct appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"DURAFORCE","offers":[{"title":"Default Title","offer_id":53679731179793,"sku":"ZZ3A00624","price":85.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/2446\/2929\/files\/57_7e966573-8cd0-4888-8b81-de0b60c12fb2.jpg?v=1781654607","url":"https:\/\/www.duraforce.com\/products\/1-4-npt-port-cabin-air-height-leveling-control-valve-kit-for-hadley-mack-volvo","provider":"DURAFORCE","version":"1.0","type":"link"}