{"product_id":"hoffman-401479-model-790-water-vent-valve","title":"Hoffman 401479 Model 790 Water Vent Valve","description":"\u003cp\u003eEfficient air removal is essential for maintaining consistent hydronic system performance, and the \u003cstrong\u003eHoffman 401479 Model 790\u003c\/strong\u003e water vent valve is engineered to keep your lines clear. This precision-built component automatically releases trapped air, preventing common issues like air binding and noise that compromise thermal transfer in residential and light commercial heating setups.\u003c\/p\u003e\u003cp\u003eThe valve operates through a high-quality float mechanism that detects the accumulation of air within the system. As air enters the valve chamber, the internal float drops, opening the vent port to discharge the gas; once water level is restored, the float rises to create a positive, leak-proof seal.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomated venting:\u003c\/strong\u003e Effectively purges trapped air to maintain peak system flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust construction:\u003c\/strong\u003e Engineered for durability and long-term reliability in hydronic water loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise reduction:\u003c\/strong\u003e Eliminates air-induced piping sounds, contributing to quieter system operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy installation:\u003c\/strong\u003e Designed for seamless integration into existing hydronic plumbing layouts.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for use in hot water heating systems, residential radiator setups, baseboard heating loops, and small-scale commercial hydronic piping where air entrapment is a concern.\u003c\/p\u003e","brand":"Hoffman","offers":[{"title":"Default Title","offer_id":43128770658398,"sku":"401479","price":97.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/401479_image_83f85282-2428-478f-b921-ee036026d7a8.png?v=1786069767","url":"https:\/\/nationalboilersupply.com\/products\/hoffman-401479-model-790-water-vent-valve","provider":"National Boiler Supply","version":"1.0","type":"link"}