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Backflow Prevention


Dual Check Valves for Carbonated Beverage Machines

Lead Free* Models Available


1/4 and 3/8 in. (8 and 10mm)


Series SD-2 Dual Check Valves for Carbonated Beverage Machines prevent the reverse flow of contaminated water, such as carbon dioxide gas and carbonated water, from entering into the potable water supply due to backpressure backflow. It consists of a stainless steel body construction with internal rubber components and is designed for continuous or intermittent pressure applications. Series SD-2 is ideal for use on post-mix carbonated beverage equipment and dispensing equipment for tea and coffee and comes in a variety of models. Maximum Working Pressure: 200psi (13.8 bar).

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Disclaimer: Watts product dimensions in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

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*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

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