{"product_id":"hoffman-401464-model-71b-non-vacuum-air-valve","title":"Hoffman 401464 Model 71B Non-Vacuum Air Valve","description":"\u003cp\u003eMaintain optimal heating efficiency by effectively venting unwanted air from your steam radiators with the \u003cb\u003eHoffman 401464 Model 71B\u003c\/b\u003e air valve. This non-vacuum air valve is engineered for durability and reliability, ensuring that trapped air does not impede the flow of steam throughout your system, which helps prevent uneven heating and potential energy waste.\u003c\/p\u003e\u003cp\u003eThis air valve functions by allowing air to escape from the system until steam reaches the unit, at which point the internal thermostatic element expands to seal the port. Once the cycle repeats and steam temperature drops, the valve automatically reopens to exhaust any newly accumulated air, maintaining a balanced and responsive heating system performance.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eAutomatic venting:\u003c\/b\u003e Quickly exhausts air to ensure maximum steam distribution across radiators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNon-vacuum design:\u003c\/b\u003e Specifically engineered for systems requiring non-vacuum operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePrecision construction:\u003c\/b\u003e Built to Hoffman's rigorous standards for longevity and consistent pressure control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Primarily used in residential and light commercial one-pipe steam heating systems to replace worn or malfunctioning radiator air vents.\u003c\/p\u003e","brand":"Hoffman","offers":[{"title":"Default Title","offer_id":43128757518430,"sku":"401464","price":98.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/401464_image_977184e4-3c28-41c4-abb6-9dcba4daa916.png?v=1786069561","url":"https:\/\/nationalboilersupply.com\/products\/hoffman-401464-model-71b-non-vacuum-air-valve","provider":"National Boiler Supply","version":"1.0","type":"link"}