{"product_id":"watts-0061888-backflow-preventer-dual-check-valve","title":"Watts 0061888 Backflow Preventer Dual Check Valve","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"17\" data-end=\"793\"\u003eThe Watts 0061888 9D-M2 Backflow Preventer Dual Check Valve is a 3\/4 inch bronze dual check valve with an intermediate atmospheric vent designed to prevent backpressure and backsiphonage from contaminating potable water systems in non-health hazard applications. Commonly installed in boiler feed lines, laboratory equipment, processing tanks, sterilizers, dairy equipment, water treatment systems, and commercial process piping requiring reliable backflow protection. Maintenance technicians, plumbing contractors, facility engineers, and system integrators use this valve for code compliance, replacement projects, preventive maintenance, and new installations requiring dependable cross-connection control and potable water protection. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"795\" data-end=\"812\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"813\" data-end=\"1630\"\u003eThe Watts 9D-M2 Dual Check Valve is widely used in boiler feed water systems, commercial heating systems, laboratory facilities, sterilization equipment, food and beverage processing plants, dairy operations, manufacturing facilities, water treatment skids, institutional buildings, schools, hospitals, mechanical rooms, and industrial process systems. The valve prevents reverse flow of polluted water into potable water supplies during backpressure or backsiphonage conditions while maintaining continuous pressure operation. Its integral atmospheric vent provides an added level of protection for non-health hazard applications, making it a common choice for smaller supply lines where regulatory compliance, equipment protection, and water quality preservation are essential. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1632\" data-end=\"1661\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1662\" data-end=\"2606\"\u003e• Manufacturer Part Number (MPN): 0061888\u003cbr data-start=\"1703\" data-end=\"1706\"\u003e• Brand: Watts\u003cbr data-start=\"1720\" data-end=\"1723\"\u003e• Model: 9D-M2\u003cbr data-start=\"1737\" data-end=\"1740\"\u003e• Product Type: Dual Check Valve Backflow Preventer\u003cbr data-start=\"1791\" data-end=\"1794\"\u003e• Series: 9D\u003cbr data-start=\"1806\" data-end=\"1809\"\u003e• Connection Size: 3\/4 in.\u003cbr data-start=\"1835\" data-end=\"1838\"\u003e• Inlet Connection: Female Union NPT\u003cbr data-start=\"1874\" data-end=\"1877\"\u003e• Outlet Connection: Female Union NPT\u003cbr data-start=\"1914\" data-end=\"1917\"\u003e• Body Material: Bronze \/ Forged Brass\u003cbr data-start=\"1955\" data-end=\"1958\"\u003e• Internal Components: Stainless Steel\u003cbr data-start=\"1996\" data-end=\"1999\"\u003e• Check Valve Type: Dual Check with Atmospheric Vent\u003cbr data-start=\"2051\" data-end=\"2054\"\u003e• Protection Type: Backpressure and Backsiphonage Prevention\u003cbr data-start=\"2114\" data-end=\"2117\"\u003e• Hazard Classification: Non-Health Hazard Applications\u003cbr data-start=\"2172\" data-end=\"2175\"\u003e• Integral Strainer: Yes\u003cbr data-start=\"2199\" data-end=\"2202\"\u003e• Disc Material: Rubber\u003cbr data-start=\"2225\" data-end=\"2228\"\u003e• Seat Material: Rubber\u003cbr data-start=\"2251\" data-end=\"2254\"\u003e• Maximum Working Pressure: 175 PSI\u003cbr data-start=\"2289\" data-end=\"2292\"\u003e• Minimum Operating Pressure: 25 PSI\u003cbr data-start=\"2328\" data-end=\"2331\"\u003e• Temperature Range: 33°F to 250°F\u003cbr data-start=\"2365\" data-end=\"2368\"\u003e• Installation Orientation: Horizontal or Vertical\u003cbr data-start=\"2418\" data-end=\"2421\"\u003e• Service Media: Hot and Cold Water\u003cbr data-start=\"2456\" data-end=\"2459\"\u003e• Compliance Standard: ASSE 1012\u003cbr data-start=\"2491\" data-end=\"2494\"\u003e• Function: Potable Water Backflow Prevention and Cross-Connection Control \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2608\" data-end=\"2632\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2633\" data-end=\"2847\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e• Watts LF9D-M2 3\/4\" Lead-Free Dual Check Valve\u003cbr data-start=\"2680\" data-end=\"2683\"\u003e• Zurn Wilkins 9D Series 3\/4\" Dual Check Backflow Preventer\u003cbr data-start=\"2742\" data-end=\"2745\"\u003e• Apollo 3\/4\" Dual Check Valve with Atmospheric Vent (ASSE 1012\u003c\/p\u003e","brand":"Watts","offers":[{"title":"New","offer_id":51731231539502,"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_a7da7cb3-8b65-4959-86a8-0972ee2d2bff.jpg?v=1770595750","url":"https:\/\/plgautomation.com\/products\/watts-0061888-backflow-preventer-dual-check-valve","provider":"PLG Automation ","version":"1.0","type":"link"}