{"product_id":"ashcroft-82135-vacuum-gauge-3-5-in-dial-1-4-npt-back-mount","title":"Ashcroft 82135 Vacuum Gauge 3.5 in Dial 1\/4 Npt Back Mount","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ASHCROFT 82135 is an analog vacuum pressure gauge designed for measuring negative pressure in mechanical systems. It features a 3.5-inch dial for easy at-a-glance reading and a 1\/4-inch NPT center back mount connection. The gauge covers a pressure range of 30 inches Hg to 0, making it suitable for vacuum measurement in HVAC, refrigeration, plumbing, and light industrial applications. Accuracy is rated at 1 percent of scale, and the stainless steel case provides durability in demanding service environments. This is a dry gauge with no liquid fill.\u003c\/p\u003e\n\u003cp\u003eThis gauge is commonly installed in residential and commercial HVAC systems, refrigeration lines, plumbing service setups, and vacuum pump monitoring applications. The center back mount configuration allows for panel or wall mounting where the process connection enters from the rear of the gauge body. It is installed by HVAC technicians, plumbers, and mechanical contractors who need a reliable vacuum indicator in a compact, readable format.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3.5-inch analog dial for clear, readable vacuum measurements\u003c\/li\u003e\n  \u003cli\u003ePressure range: 30 inches Hg to 0 (full vacuum to atmospheric)\u003c\/li\u003e\n  \u003cli\u003e1\/4-inch NPT center back mount connection for panel or wall installation\u003c\/li\u003e\n  \u003cli\u003eStainless steel case for corrosion resistance in harsh environments\u003c\/li\u003e\n  \u003cli\u003e1 percent of scale accuracy for reliable field readings\u003c\/li\u003e\n  \u003cli\u003eDry gauge construction with no liquid fill\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-install vacuum gauge for mechanical systems requiring a 1\/4-inch NPT center back mount connection and a 30 inches Hg to 0 pressure range.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by a licensed HVAC technician, plumber, or qualified mechanical contractor. Before installing or replacing the gauge, isolate and depressurize the system completely. Use appropriate thread sealant on the NPT connection and avoid overtightening, which can damage the gauge body or fitting. Verify that the process pressure range does not exceed the gauge rating before bringing the system back online.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Range\u003c\/strong\u003e: 30 inches Hg to 0\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Vacuum\u003c\/strong\u003e: 30 inches Hg\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 1 percent of scale\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDial Diameter\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDial Type\u003c\/strong\u003e: Analog\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: NPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Center Back\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCase Material\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLiquid Filled\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.2 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ASHCROFT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 82135\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ASHCROFT","offers":[{"title":"Default Title","offer_id":51543012278578,"sku":"82135","price":239.07,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/354cb3162489ff68ea41d248e4d39263_f2397137-c121-4f60-a3b3-364e4bb8b9b1.jpg?v=1785913648","url":"https:\/\/voomisupply.com\/products\/ashcroft-82135-vacuum-gauge-3-5-in-dial-1-4-npt-back-mount","provider":"Voomi Supply","version":"1.0","type":"link"}