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     HOME > BACKFLOW, CHECK VALVES > Double Check Vented Backflow Preventer | Watts ASSE 1022

Double Check Vented Backflow Preventer | Watts ASSE 1022


Double Check Vented Backflow Preventer Watts, ASSE-1022 approved

Watts SD3 Double Check Vented Backflow Preventer | Watts ASSE 1022
THESE VENT ATMOSPHERICALLY, MEANING WATER WILL LEAK FROM THE VENT PORT! Some leak more than others. Installers must use their Fitting and Tubing of choice to run to a floor drain or drain saddle, see related items below the table.
This will satisfy the bureaucrat that is stopping you from making coffee & beverage.
Failure to read and follow the installation instructions, is a failure!
Click here for Product Info and Installation Instructions
  • 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
  • Endurance tested for more than 500,000 pumping cycles
  • Atmospheric port provides visual indication of failure of the second check
  • Wye-pattern strainer model for water supply installations
  • All materials in contact with the potable water are in compliance with the requirements of the Safe Drinking Water Act, Public Law 93-523, National Interim Primary Drinking Water Regulations.
  • Strainer manufactured from NSF-approved acetal plastic
  • Scroll down to bottom of page for more info and Installation.
Part # Size x Size
Stock
Price
Qty
SD3-66 3/8"x3/8" Flare Dual Check Vented,
No Strainer, ASSE 1022
In Stock  
$47.72
SD3-MF-4B 1/4"x1/4" Flare x FPT Dual Check, Vented
w/ Strainer ASSE 1022
In Stock  
$50.86
SD3-MF-6C 3/8"x3/8" Flare x FPT Dual Check, Vented
w/ Strainer ASSE 1022
In Stock  
$51.03

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Click here for Product Info and Installation Instructions
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. The SD3 atmospheric vent provides a visual indication of failure in the event that the downstream check fails and system back-pressure exceeds the supply pressure.

Watts SD3 is recommended for use on Post-Mix Carbonated Beverage Equipment and equipment for tea and coffee.

Installation Instruction Before installing, flush out pipe lines to remove scale and other foreign matter. The valve can be installed horizontally or vertically (flow up or down). Install the valve in the line with the arrow on the valve body pointing in the direction of flow. Connect a vent discharge line to the vent outlet of the SD3 and vent to a safe place of disposal with adequate ventilation. The valve should be installed such that the strainer and the valve are accessible for service and maintenance.
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