1" Bronze Dual Check Valve Backflow Preventer , Lead-Free

Apollo® DC4A / DCLF4A Double Check Valves – Trusted Backflow Prevention for Non-Health Hazard Applications

The Apollo® DC4A and DCLF4A Series double check valve assemblies are engineered to prevent the reverse flow of water caused by backpressure or backsiphonage in non-health hazard systems. Constructed from lead-free bronze, these assemblies are an ideal solution for cross-connection control in irrigation, fire protection, commercial plumbing, and similar applications where contamination risk is present but not classified as high hazard.

With a modular, top-entry design and stainless steel components throughout, these backflow assemblies are built for long service life, ease of maintenance, and dependable performance in the field. Each unit is backed by a five-year factory warranty and meets all major industry certifications for backflow prevention devices.

Performance Features for Field Professionals

• Lead-Free Certified Construction – Compliant with NSF/ANSI 372 for use in potable water systems.
• Modular Check Valve Cartridges – Top-entry design enables quick servicing and replacement of internal components without removing the valve from the line.
• Low Pressure Drop – Independently tested to minimize system head loss, ensuring efficient flow characteristics.
• Chloramine-Resistant Elastomers – Durable seals and seats enhance compatibility with chemically treated municipal water.
• Ball Valve Shut-Offs with Stainless Steel Handles – Provide smooth operation and long-term corrosion resistance.
• Top-Mounted Test Cocks – Simplify annual inspection, testing, and maintenance procedures to meet code requirements.
• Universal Orientation – Approved for both vertical (upflow) and horizontal installations, offering flexibility on the job site.

Technical Specifications

• Model Numbers: DC4A / DCLF4A
• Body Material: Lead-free bronze (C84400 or C89836)
• Operating Pressure: 10–175 PSI
• Temperature Range: 33°F – 180°F
• Sizes Available: 1/2" through 2"
• Certifications: ASSE 1015, CSA B64.5, NSF/ANSI 61 & 372, IAPMO listed
• Warranty: 5-year manufacturer warranty

Installation & Application Considerations

These assemblies are designed for use where double check protection is allowed by code. Installation must comply with local plumbing regulations and typically includes allowances for clearance, test access, and drainage. Professional installation is recommended to ensure compliance and proper performance. Isolation valves and unions upstream/downstream are also suggested to streamline future maintenance.

Built for Contractors Who Value Efficiency

• Quick-Access Internals – Modular check cartridges reduce service time and labor costs.
• Rugged Construction – Components are built for real-world jobsite conditions and continuous duty use.
• Flexible Install – Can be used in tight mechanical rooms or retrofits where vertical or horizontal orientation is needed.

Proven Protection in a Compact Package

The Apollo® DC4A and DCLF4A double check valves provide reliable, field-tested protection against backflow contamination in systems handling non-toxic substances. Designed with contractors in mind, these assemblies combine robust engineering with simplified maintenance—helping you protect water systems efficiently and effectively.