{"product_id":"watts-n36-m115cfm-vacuum-relief-valve-1-2-in-npt","title":"Watts N36-M115CFM Vacuum Relief Valve 1\/2 in NPT","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"17\" data-end=\"640\"\u003eThe Watts N36-M115CFM Vacuum Relief Valve is a 1\/2 inch NPT vacuum relief valve designed to automatically admit air into piping systems or vessels when internal pressure falls below atmospheric pressure, preventing vacuum formation and protecting equipment from collapse or siphonage. Commonly installed in water heaters, storage tanks, hydronic systems, process piping, and industrial fluid handling applications, it helps maintain system integrity and ensures safe operation during draining or pressure fluctuations. This particular unit is noted as missing the protective cover. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"642\" data-end=\"659\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"660\" data-end=\"1223\"\u003eThe Watts N36-M115CFM Vacuum Relief Valve is widely used in commercial water heating systems, hot water storage tanks, industrial process vessels, hydronic heating systems, plumbing installations, and fluid distribution networks. By automatically opening under vacuum conditions, it allows air to enter the system and prevents negative pressure from damaging tanks, piping, and associated equipment. It is commonly specified in applications where vacuum protection, anti-siphon performance, and equipment safety are critical. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1225\" data-end=\"1254\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1255\" data-end=\"1929\"\u003e• Manufacturer Part Number (MPN): N36-M115CFM\u003cbr data-start=\"1300\" data-end=\"1303\"\u003e• Brand: Watts\u003cbr data-start=\"1317\" data-end=\"1320\"\u003e• Product Type: Vacuum Relief Valve\u003cbr data-start=\"1355\" data-end=\"1358\"\u003e• Valve Size: 1\/2 in.\u003cbr data-start=\"1379\" data-end=\"1382\"\u003e• Connection Type: Male NPT\u003cbr data-start=\"1409\" data-end=\"1412\"\u003e• Function: Automatic Vacuum Relief \/ Air Admission\u003cbr data-start=\"1463\" data-end=\"1466\"\u003e• Service Media: Water and Compatible Non-Corrosive Fluids\u003cbr data-start=\"1524\" data-end=\"1527\"\u003e• Body Material: Brass\u003cbr data-start=\"1549\" data-end=\"1552\"\u003e• Installation: Vertical Orientation Recommended\u003cbr data-start=\"1600\" data-end=\"1603\"\u003e• Operating Principle: Spring-Loaded Vacuum Relief\u003cbr data-start=\"1653\" data-end=\"1656\"\u003e• Application: Water Heaters, Storage Tanks, and Piping Systems\u003cbr data-start=\"1719\" data-end=\"1722\"\u003e• Purpose: Prevent Vacuum Formation and Equipment Damage\u003cbr data-start=\"1778\" data-end=\"1781\"\u003e• Protection: Anti-Siphon and Vacuum Break Capability\u003cbr data-start=\"1834\" data-end=\"1837\"\u003e• Maintenance: Field Serviceable\u003cbr data-start=\"1869\" data-end=\"1872\"\u003e• Condition Note: Protective Cover Missing (as specified)\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"1931\" data-end=\"1955\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"1956\" data-end=\"2062\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e• Watts N36 Vacuum Relief Valve\u003cbr data-start=\"1987\" data-end=\"1990\"\u003e• Watts FV-4M1 Automatic Float Vent\u003cbr data-start=\"2025\" data-end=\"2028\"\u003e• Watts N36-M1 Vacuum Relief Valve\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":51731206701358,"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_f8eb8182-c570-4d76-a2df-0145871cb6fb.jpg?v=1770595669","url":"https:\/\/plgautomation.com\/products\/watts-n36-m115cfm-vacuum-relief-valve-1-2-in-npt","provider":"PLG Automation ","version":"1.0","type":"link"}