Copper Backflow Preventer

Backflow preventer is mainly used to prevent the medium in the pipeline from backflow due to pressure inversion, applicable to water, air and non-corrosive liquids, widely used in municipal water supply, building water supply and drainage, fire-fighting and industrial circulation system. Working temperature is generally 0 ℃ to 80 ℃, special materials can withstand higher temperatures. It is suitable for normal pressure to low and medium pressure working conditions. The main function is to realize double protection through the internal non-return and pressure relief structure to prevent backflow of contaminated media. Commonly used materials include copper alloy, stainless steel and ductile iron, compact structure, easy maintenance, to protect the system water quality safety and operational stability.

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products

Copper Backflow Preventer

Model: DH11X / HS11X

Subtitle：Double check valve

The Copper Double Check Valve is a high performance compact unit designed to protect potable water systems from backflow contamination. Constructed of a durable lead-free copper alloy, it is ideal for residential, commercial and light industrial applications where water safety and reliability are critical.

Tags:Brass Valve

Classification:backflow preventer

Working conditions:construction work, HVAC system, waterwork

Product Overview	The Copper Double Check Valve is a high performance compact unit designed to protect potable water systems from backflow contamination. It is made of a durable lead-free copper alloy and is ideal for residential, commercial and light industrial applications where water safety and reliability are important. Equipped with a double check valve assembly, this backflow preventer ensures effective backflow prevention even in low-risk applications. Its corrosion-resistant copper construction makes it suitable for potable water systems, and its compact design makes it easy to install in tight spaces.

Working Principle	The double check valve works through two separate check valves: The first check valve: when the downstream pressure exceeds the water supply pressure, the check valve is closed to prevent backflow. Second check valve: acts as a secondary barrier to provide additional protection in the event of a failure of the first check valve. Shut-off valve: Integrated isolation valve for easy testing and maintenance without interrupting the water supply.

Main features	Lead-free copper construction: meets NSF/ANSI 372 standards and Safe Drinking Water Act (SDWA) requirements. Corrosion-resistant to ensure long-term durability of drinking water systems. Dual check valve design: two independently operated check valves provide redundant backflow protection. Test plug facilitates field testing and maintenance. COMPACT AND LIGHTWEIGHT: Space-saving design, ideal for residential and commercial installations. Easy to install horizontally or vertically. LOW PRESSURE DROP: Optimized flow path minimizes pressure loss and ensures efficient water supply. Compliance and Certification: Meets ASSE 1015, CSA B64.6 and NSF/ANSI 372 standards for backflow prevention devices.

Product Advantages	Reliable protection: double check valves ensure fail-safe and prevent backflow. Easy to maintain: Test plugs can be quickly tested in the field without disassembly. Corrosion resistance: Copper construction ensures a long life for the drinking water system. Cost-effective: Lower installation and maintenance costs compared to RPZ units.

Why Choose Us	Compliance: Meets all major backflow prevention industry standards. DURABILITY: Lead-free copper construction resists corrosion and extends service life. Versatility: suitable for residential, commercial and light industrial applications. Support: comprehensive technical documentation and global service.

Medium of use

Water/hot water, Sewage/wastewater

working condition

construction work, HVAC system, waterwork

summarize

The Copper Double Check Valve is a reliable and cost-effective solution for protecting potable water systems from backflow contamination. Its lead-free copper construction, double check valve design and compact profile make it ideal for residential, commercial and irrigation applications. Complying with ASSE 1015, CSA B64.6, and NSF/ANSI 372 standards, the device ensures water supply safety and system reliability, providing peace of mind for engineers, contractors, and end users.

Product Parameters

Nominal diameter	½" to 2" (DN15 to DN50)
Nominal pressure	PN6-PN16, maximum working pressure 150 psi (10.3 bar)
Applicable temperature	0.5°C-80°C
Valve Material	Lead-free copper alloy (C84400 or equivalent)
sealing material	EPDM or NBR (FDA drinking water compliant)
connection method	Threaded (NPT) or flanged (optional)