{"product_id":"watts-water-technologies-fv-4m1-automatic-float-vent","title":"Watts Water Technologies FV-4M1 Automatic Float Vent","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"17\" data-end=\"620\"\u003eThe Watts FV-4M1 Automatic Float Vent is a 1\/4 inch automatic air vent valve designed to continuously remove trapped air from hot or cold water hydronic systems while preventing water loss. Commonly installed in boilers, hydronic heating systems, chilled water systems, radiant heating systems, HVAC equipment, circulation loops, and commercial water distribution systems. The float-operated mechanism automatically vents accumulated air and reseals once air is expelled, helping maintain system efficiency, reduce noise, and prevent air-related performance issues. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"622\" data-end=\"639\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"640\" data-end=\"1207\"\u003eThe Watts FV-4M1 is widely used in residential and commercial hydronic heating systems, boiler rooms, radiant floor heating systems, chilled water systems, heat exchangers, circulation loops, mechanical rooms, and HVAC installations. The valve automatically removes trapped air during operation and can also function as an anti-vacuum device when systems are drained. Its high-temperature resistant float and glycol compatibility make it suitable for heating and cooling applications requiring reliable automatic air elimination. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1209\" data-end=\"1238\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1239\" data-end=\"2086\"\u003e• Brand: Watts\u003cbr data-start=\"1253\" data-end=\"1256\"\u003e• Model: FV-4M1\u003cbr data-start=\"1271\" data-end=\"1274\"\u003e• Product Type: Automatic Float Vent \/ Air Vent Valve\u003cbr data-start=\"1327\" data-end=\"1330\"\u003e• Valve Size: 1\/4 in.\u003cbr data-start=\"1351\" data-end=\"1354\"\u003e• Connection Type: Male NPT Threaded\u003cbr data-start=\"1390\" data-end=\"1393\"\u003e• Body Material: Brass\u003cbr data-start=\"1415\" data-end=\"1418\"\u003e• Cover Material: Brass\u003cbr data-start=\"1441\" data-end=\"1444\"\u003e• Float Material: High-Temperature Resistant Polyethylene\u003cbr data-start=\"1501\" data-end=\"1504\"\u003e• Seal Material: Silicone Rubber\u003cbr data-start=\"1536\" data-end=\"1539\"\u003e• Maximum Working Pressure: 150 PSI (10 Bar)\u003cbr data-start=\"1583\" data-end=\"1586\"\u003e• Minimum Working Pressure: 1.45 PSI (10 kPa)\u003cbr data-start=\"1631\" data-end=\"1634\"\u003e• Maximum Operating Temperature: 240°F (116°C)\u003cbr data-start=\"1680\" data-end=\"1683\"\u003e• Minimum Operating Temperature: 33°F (5°C)\u003cbr data-start=\"1726\" data-end=\"1729\"\u003e• Service Media: Hot or Cold Water\u003cbr data-start=\"1763\" data-end=\"1766\"\u003e• Glycol Compatible: Yes\u003cbr data-start=\"1790\" data-end=\"1793\"\u003e• Vent Type: Automatic Float Operated\u003cbr data-start=\"1830\" data-end=\"1833\"\u003e• Installation Orientation: Vertical\u003cbr data-start=\"1869\" data-end=\"1872\"\u003e• Function: Automatic Air Removal and Vacuum Relief\u003cbr data-start=\"1923\" data-end=\"1926\"\u003e• Maintenance: Disassemblable for Inspection and Cleaning\u003cbr data-start=\"1983\" data-end=\"1986\"\u003e• Application: Hydronic Heating and Water Distribution Systems \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2088\" data-end=\"2112\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2113\" data-end=\"2268\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e• Watts FV-4M1-1\/8 \u003cbr data-start=\"2150\" data-end=\"2153\"\u003e• Watts FV-4M1-1\/2 \u003cbr data-start=\"2190\" data-end=\"2193\"\u003e• Watts FV-4M1-3\/4 \u003c\/p\u003e","brand":"WATTS","offers":[{"title":"New","offer_id":51731213779246,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_7c5c85a4-4d52-4d83-b159-17d5d447a393.jpg?v=1770595692","url":"https:\/\/plgautomation.com\/products\/watts-water-technologies-fv-4m1-automatic-float-vent","provider":"PLG Automation ","version":"1.0","type":"link"}