Jump to Section
9D
Dual Check Valve Backflow Preventers with Intermediate Atmospheric Vent
×
9D
Dual Check Valve Backflow Preventers with Intermediate Atmospheric Vent
Jump to Section
Series 9D Dual Check Valves with Intermediate Atmospheric Vent prevent the reverse flow of hot or cold polluted water from entering into the potable water supply. They have a brass body with stainless steel internal parts, integral strainer, and two durable, tight-sealing, rubber check valves. Series 9D is designed for continuous pressure, non-health hazard applications in smaller supply lines, such as laboratory equipment, processing tanks, sterilizers, dairy equipment, and specifically for boiler feed lines. Minimum Working Pressure: 25psi (172kPa), Maximum Working Pressure: 175psi (12.1 bar)
Approval/Certification Information
For product-specific approval information, please refer to the product’s specification sheet (see literature section above) or ask a Watts representative . Some certification agencies allow you to search by product name and brand.
Literature
Installation, Operation and Maintenance Manuals
Installation Instructions - 9DM2, 9DM3, LF9D Repair Kits Parts Breakdown - 9D, LF9D, 8, NF8, SD-3, 9BD, 7, LF7, N9, LFN9, NLF9, N9-CD, 912HP, SD-2
Sales Literature
Specifications
</span>
<span class="list-view-thumb list-view-material" style="display:none">{default-icon-svg}</span>
<img style="display:none;" data-extract="defaulticonend">
<video controls="" class="js-video video video-for-thumbnail" preload="metadata" poster=https://www.watts.com/products/plumbing-flow-control-solutions/backflow-preventers/dual-checksdual-checks-with-atmospheric-vent/"/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/25493-50045" data-size-480p="https://media.watts.com/Dmm3BWSV3/assetstream.aspx?assetid=25493&mediaformatid=50038&destinationid=10016&lastmodified=638556396940000000" data-size-720p="https://media.watts.com/Dmm3BWSV3/assetstream.aspx?assetid=25493&mediaformatid=50039&destinationid=10016&lastmodified=638556396940000000" data-size-1080p="https://media.watts.com/Dmm3BWSV3/assetstream.aspx?assetid=25493&mediaformatid=50040&destinationid=10016&lastmodified=638556396940000000">
<source src=https://www.watts.com/products/plumbing-flow-control-solutions/backflow-preventers/dual-checksdual-checks-with-atmospheric-vent/"https://media.watts.com/Dmm3BWSV3/assetstream.aspx?assetid=25493&mediaformatid=50040&destinationid=10016%22 type="video/mp4">
</source></video>
</div>
</div>" aria-label="Product Overview Video - 9D">
Product Overview Video - 9D
Runtime : 00:01:03 Watch Now
</span>
<span class="list-view-thumb list-view-material" style="display:none">{default-icon-svg}</span>
<img style="display:none;" data-extract="defaulticonend">
<video controls="" class="js-video video video-for-thumbnail" preload="metadata" poster=https://www.watts.com/products/plumbing-flow-control-solutions/backflow-preventers/dual-checksdual-checks-with-atmospheric-vent/"/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/59916-50045" data-size-480p="https://media.watts.com/Dmm3BWSV3/assetstream.aspx?assetid=59916&mediaformatid=50038&destinationid=10016&lastmodified=638556397430000000" data-size-720p="https://media.watts.com/Dmm3BWSV3/assetstream.aspx?assetid=59916&mediaformatid=50039&destinationid=10016&lastmodified=638556397430000000" data-size-1080p="https://media.watts.com/Dmm3BWSV3/assetstream.aspx?assetid=59916&mediaformatid=50040&destinationid=10016&lastmodified=638556397430000000">
<source src=https://www.watts.com/products/plumbing-flow-control-solutions/backflow-preventers/dual-checksdual-checks-with-atmospheric-vent/"https://media.watts.com/Dmm3BWSV3/assetstream.aspx?assetid=59916&mediaformatid=50040&destinationid=10016%22 type="video/mp4">
</source></video>
</div>
</div>" aria-label="Video - Watts 9D Dual Check Valve">
Video - Watts 9D Dual Check Valve
Runtime : 00:01:03 Watch Now
Select a Model
Select options below to identify the UPC, Order Code, and Repair Kit for a specific 9D
Model
Used On - Series or Model
Kit Contents
</br>9DM2</br>
Diaphragm Assembly, Disc Assembly, Seat, Seat O-ring, 2 Union Seals</br>
</br>9DM2</br>
Diaphragm Assembly, Disc Assembly, Seat, Seat O-ring, 2 Union Seals</br>
Where to buy
