3/4 in. Forged Brass Union Dual Check Valve with Intermediate Atmospheric Vent

  • Product Type: Dual Check Valve with Intermediate Atmospheric Vent (Backflow Preventer)

  • Body Material: Heavy-Duty Lead-Free Forged Brass (SUS 316L Stainless Steel custom runs available)

  • Connection Size: 3/4″ Union Inlet x Union Outlet (Custom sizes from 1/2″ to 2″ supported)

  • Thread & Connection: NPT, BSP Thread options with Union nuts for easy installation and maintenance

  • Global Standards Compliance: Designed to conform with ASSE 1012, CSA B64.3, and NSF/ANSI 61/372 (Lead-Free)

  • Max Pressure & Temp: Rated up to 150 PSI | Max Temperature: 180°F (82°C)

  • B2B Flexible Policy: NO MOQ (Zero Minimum Order Quantity) | Custom OEM/ODM laser etching and packaging supported

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Product Description

This lead-free compact check valve is engineered for reliable performance and easy maintenance. Designed with true line-sized construction, the check modules open wider to allow dirt and debris to pass through, reducing the risk of fouling and ensuring consistent operation over time. The stainless steel internal parts deliver superior durability and corrosion resistance, while the simple design makes servicing fast and efficient.

The valve is built for maximum flow with minimal pressure drop, helping improve system efficiency. It comes furnished with convenient union connections for quick removal and replacement during maintenance. Its versatile design supports both vertical and horizontal installation, making it suitable for a wide range of plumbing, irrigation, and water supply applications.

Key Features

True line-sized construction — allows wider check opening to reduce fouling from debris.
Stainless steel internal parts — for long-lasting durability and corrosion resistance.
Optimized flow performance — maximum flow at low pressure drop.
Union connections — easy removal and replacement during routine maintenance.
Compact design — combines performance, economy, and space efficiency.
Simple structure — easy to service and maintain.
Flexible installation — suitable for both vertical and horizontal orientations.
Lead-free construction — compliant with modern safety and environmental standards.
Ideal Applications: water distribution systems, irrigation systems, HVAC, industrial utilities, and general fluid control systems.

Valve Type Double Check Valve with Intermediate Atmospheric Vent
Valve Size 3/4 inch
Body Style Inline
End Connection Union × Union
Installation Orientation Horizontal or Vertical
Body Material Brass
Internal Parts Stainless Steel
Seat & Disc Material Rubber
Temperature Range 33°F – 250°F (0.5°C – 121°C)
Pressure Range 25 – 175 psi
Maximum Working Pressure 175 psi
Weight 1.75 lb
Length 4-1/2 in
Width 2-9/16 in
Height 5-11/20 in
Included Component Strainer
Construction Lead-free, corrosion-resistant design
Valve Type Double Check Valve with Intermediate Atmospheric Vent
Valve Size 3/4 inch
Body Style Inline
End Connection Union × Union
Installation Orientation Horizontal or Vertical
Body Material Brass
Internal Parts Stainless Steel
Seat & Disc Material Rubber
Temperature Range 33°F – 250°F (0.5°C – 121°C)
Pressure Range 25 – 175 psi
Maximum Working Pressure 175 psi
Weight 1.75 lb
Length 4-1/2 in
Width 2-9/16 in
Height 5-11/20 in
Included Component Strainer
Construction Lead-free, corrosion-resistant design

Complies with Lead Free Plumbing Laws, NSF/ ANSI 61, UPC/ CE, ISO 9001

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please contact Fanovo.

FANOVO STATEMENT OF WARRANTY & LIMITATION OF WARRANTY

Fanovo warrants, to our all purchasers, that its products which are delivered to its purchasers will be the kind described in the order or price list and will be free of defects in workmanship or material for a period of two year from the date of shipping to you, our purchaser.

Should any failure to conform to this warranty appear within two year after the date of the initial delivery to our purchaser, Fanovo will, upon written notification thereof and substantiation that the goods have been stored, installed, maintained and operated in accordance with Fanovo’s recommendation and standard industry practice, correct such defects by suitable repair or replacement at Fanovo’s own expense. If any valve alleged to be defective, is reported to Fanovo headquarter in China, it will be examined and, if found to be defective under the warranty, it will be replaced at no charge in future order.

THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR OTHER WARRANTY OF QUALITY, WHETHER EXPRESS OR IMPLIED, EXCEPT THE WARRANTY OF TITLE AND AGAINST PATENT INFRINGEMENT Correction of non-conformities, in the manner and for the period of time provided above, shall constitute fulfillment of all liabilities of Fanovo to our purchaser, with respect to the goods, whether based on contract, negligence, strict tort or otherwise, it is the intention of Fanovo that no warranty of any kind, whether express or implied, shall pass through our purchaser to any other person or corporation.

LIMITATION OF LIABILITY: FANOVO SHALL NOT UNDER ANY CIRCUMSTANCES BE LIABLE FOR SPECIAL OR CONSEQUENTIAL DAMAGES SUCH AS, BUT NOT LIMITED TO, DAMAGES OR LOSS OF OTHER PROPERTY OR EQUIPMENT, LOSS OF PROFITS, OR REVENUE, COST OF CAPITAL, COST OF PURCHASED OR REPLACEMENT GOODS, OR CLAIMS OF CUSTOMERS OF OUR INITIAL PURCHASER. THE REMEDIES OF OUR INITIAL PURCHASER, AND ALL OTHERS, SET FORTH HEREIN ARE EXCLUSIVE, AND THE LIABILITY OF FANOVO WITH RESPECT TO SAME SHALL NOT, EXCEPT AS EXPRESSLY PROVIDED HEREIN, EXCEED THE PRICE OF GOODS UPON WHICH SUCH LIABILITY IS BASED.

Fanovo is not just innovative products—we also provide wide-ranging capabilities, including design, manufacturing, and distribution. Each of these capabilities, as well as others, can be scaled to your needs – you can use as much or as little as makes sense for your product development.

Our Strengths

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