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Watts SD-3 MF Dual Check Valve, Atmospheric Vent, Wye Pattern Strainer, SAE Male Flare Outlet Connection, 3/8 inch
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Watts SD-3 MF Dual Check Valve, Atmospheric Features
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Prevents a backflow of contaminated water (i.e. carbon dioxide gas and carbonated water) from entering your potable water supply due to backpressure
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Ideal for use on post-mix carbonated beverage equipment or tea or coffee dispensers, kit consists of first and second check assemblies complete
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Designed for either continuous or intermittent pressure applications to be installed horizontally or vertically
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Features a corrosion-resistant stainless-steel body; internal rubber components; a wye pattern strainer; female NPT inlet with SAE male flare outlet connections; and an atmospheric port that provides visual indication of failure
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Size is 2.5 x 2.5 x 5.06 inches, Maximum Pressure 150psi (10.3 bar), and Maximum Temperature 130°F (54°C)
About Watts SD-3 MF Dual Check Valve, Atmospheric
The Watts SD3 is a dual check with atmospheric port designed for the protection of the water supply from carbon dioxide gas and carbonated water. These substances can flow from post-mix beverage systems and are very acidic. If the acidic water comes in contact with copper tubing or copper pipe, it will cause the leaching of copper salts into the water supply. The dissolved copper if ingested can cause nausea, abdominal pain, and in some cases vomiting. The SD3 prevents the reverse flow of potentially contaminated water back into the potable water supply. In the event the second check valve becomes fouled, the vent port is opened to atmospheric and water and or CO2 gas from the downstream piping is discharged.
