WATTS® 0061657 SD3 Dual Check Valve, 3/8 in, Male SAE Flare, 316 Stainless Steel Body

1016621 MFG #: 0061657
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WATTS® Dual Check Valve, 3/8 in Nominal Size, Male SAE Flare, 150 psi, 130 deg F, 4-1/2 in Inlet to Outlet Length, 316 Stainless Steel Body

Series 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 into the potable water supply due to back pressure backflow and is used for continuous or intermittent pressure conditions. The SD3 atmospheric vent provides a visual indication of failure in the event that the downstream check fails and system backpressure exceeds the supply pressure.The Watts SD3 is recommended for use on Post-Mix Carbonated Beverage Equipment and dispensing equipment for tea and coffee.

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  • Features
  • Certified to ANSI/NSF Standard 18, manual food and beverage dispensing equipment
  • ASSE 1022 approved dual check with atmospheric vent
  • 316 stainless steel body for corrosion resistance
  • All rubber compounds comply with FDA food additive regulations
  • Streamlined body design minimizes pressure loss and cavitation
  • A wide variety of custom end connections are available
  • Endurance tested for more than 500,000 pumping cycle
  • Atmospheric port provides visual indication of failure of the second check
  • Wye pattern strainer model for water supply installations
  • Carbonated beverage equipment and dispensing equipment for tea and coffee
  • The above connections are available as outlet connections only, strainer inlet connection is always FNPT
  • The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight
  • Standard/Approvals: ANSI/NSF 18, ASSE 1032
  • WARRANTY: Limited