{"product_id":"caleffi-na502740a-robocal-automatic-air-vent-1-2-connection-with-check-valve-and-hygroscopic-cap","title":"Caleffi NA502740A Robocal Automatic Air Vent, 1\/2\" Connection, with Check Valve and Hygroscopic Cap","description":"\u003cp\u003eThe Caleffi NA502740A is a Robocal automatic air vent with a 1\/2\" connection, a built-in check valve and a hygroscopic safety cap. It releases air that collects at high points of a closed hydronic system.\u003c\/p\u003e\u003cp\u003eRobocal vents are compact automatic air vents for hydronic heating and cooling systems, installed at high points, on manifolds, air separators and terminal units. The check valve lets the vent be removed for service without draining the system, and the hygroscopic cap is designed to swell and seal the vent outlet if water reaches it.\u003c\/p\u003e\u003cp\u003eBefore ordering: confirm the 1\/2\" thread size and type on your fitting or manifold port. See the installation manual for pressure and temperature ratings.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Caleffi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e NA502740A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Robocal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Automatic air vent\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e Check valve, hygroscopic cap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type:\u003c\/strong\u003e Hydronic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 8016615594881\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air Vents\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDocuments\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003ca href=\"https:\/\/res.cloudinary.com\/dzhpkjoqj\/Caleffi\/NA502740A_CALE-NA502740A_8016615594881_Inst.pdf\" target=\"_blank\" rel=\"noopener\"\u003eInstallation \u0026amp; Operation Manual\u003c\/a\u003e (PDF)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eSee also: \u003ca href=\"\/collections\/air-vents\"\u003eair vents\u003c\/a\u003e, \u003ca href=\"\/collections\/caleffi-north-america\"\u003eall Caleffi products\u003c\/a\u003e.\u003c\/p\u003e","brand":"Caleffi","offers":[{"title":"Default Title","offer_id":50517454520423,"sku":"CALE-NA502740A","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/2253\/3479\/files\/NA502740A_CALE-NA502740A_8016615594881.jpg?v=1792424680","url":"https:\/\/www.thehousesupplier.com\/products\/caleffi-na502740a-robocal-automatic-air-vent-1-2-connection-with-check-valve-and-hygroscopic-cap","provider":"The House Supplier","version":"1.0","type":"link"}