{"product_id":"hoffman-401497-model-77-water-vent-valve","title":"Hoffman 401497 Model 77 Water Vent Valve","description":"\u003cp\u003eMaintaining peak hydronic system efficiency requires reliable air removal, and the \u003cstrong\u003eHoffman 401497 Model 77\u003c\/strong\u003e water vent valve is engineered to provide precise, automatic venting of trapped air. By preventing air-bound pipes and radiators, this valve helps ensure consistent heating output and quiet system operation throughout residential and light commercial environments.\u003c\/p\u003e\u003cp\u003eThis valve features a rugged construction designed to resist corrosion and handle the pressure demands of hydronic loops. It utilizes a precision-engineered internal float mechanism that stays closed while liquid is present and opens automatically to release accumulated air as it travels through the piping network, protecting your system from the inefficiencies of airlocks.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Air Release:\u003c\/strong\u003e Ensures continuous, maintenance-free removal of trapped air from hydronic lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability Engineered:\u003c\/strong\u003e Constructed to withstand high-pressure water systems and prevent premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Optimization:\u003c\/strong\u003e Prevents common hydronic issues like corrosion, reduced heat transfer, and disruptive water hammer.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for use in baseboard radiation systems, hot water boilers, piping mains, and localized high points within hydronic HVAC circuits where air accumulation frequently occurs.\u003c\/p\u003e","brand":"Hoffman","offers":[{"title":"Default Title","offer_id":43128786747486,"sku":"401497","price":69.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/401497_image_ad1170b8-eb7b-4fb9-8632-7e10724c1510.png?v=1786070019","url":"https:\/\/nationalboilersupply.com\/products\/hoffman-401497-model-77-water-vent-valve","provider":"National Boiler Supply","version":"1.0","type":"link"}