Apollo Valves, 4ALF104A2F, Double Check Valve Assembly, 3/4 in, FPT - female thread conical (NPT), Bronze, Dual Check

Backflow Protection You Can Rely On – Apollo® Model DC4A / DCLF4A Double Check Valve Assembly

The Apollo® 3/4" Lead-Free Double Check Valve Assembly (models DC4A and DCLF4A) is engineered to provide critical protection against backpressure and backsiphonage in potable water systems. Designed for both residential and commercial use, this valve assembly prevents the reverse flow of contaminants into the clean water supply, maintaining system integrity and code compliance.

Professional-Grade Design for Demanding Installations

Built with a heavy-duty bronze body and featuring modular internal components, the Apollo® double check valve is optimized for long-term serviceability. Top-entry access allows for in-line maintenance without disassembly from the piping system. Its compact footprint and versatile orientation make it a preferred solution for contractors needing performance and adaptability in tight installations.

Core Features

• Low Pressure Loss – Independently verified to support high-flow performance without significant drop.
• Modular Cartridge Checks – Each check valve is preassembled in a removable cartridge for fast service and minimal downtime.
• Captured Stainless Steel Springs – Resistant to corrosion and vibration, ensuring reliable operation under fluctuating conditions.
• Top-Mounted Test Cocks – Streamlines backflow testing and certification procedures.
• Full-Port Ball Valves with Stainless Steel Handles – Provide durable shutoff and control in high-demand systems.
• Lead-Free Bronze Body – Cast from C84400 or C89836 alloy for compliance with Safe Drinking Water Act standards.
• Chloramine-Resistant Elastomers – Withstands aggressive water chemistries for extended seal life.
• Dual Installation Orientation – Approved for both vertical up and horizontal line configurations.
• No Special Tools Required – Maintenance tasks can be performed with basic hand tools.

Specifications

• Model Numbers: DC4A / DCLF4A
• Size: 3/4"
• Connection Type: Threaded
• Material: Lead-Free Bronze (C84400 or C89836)
• Operating Pressure: 175 PSI Max
• Temperature Range: 33°F to 180°F
• Warranty: 5-Year Manufacturer’s Warranty

Installation Considerations

Although this assembly is designed for user-friendly maintenance, installation should be performed by a licensed plumber familiar with local backflow prevention codes. Proper orientation and test procedures are critical for ensuring compliance and functionality. Pre-installation flushing of lines is recommended to avoid fouling the check components.

Built for the Field

For Plumbing Contractors: The Apollo® DC4A series provides peace of mind with its dependable shutoff performance, simplified maintenance design, and recognized ASSE/CSA certifications. Whether for irrigation systems, boiler feed lines, or commercial water services, this backflow preventer is built to deliver under pressure.

Ensure Clean Water Supply—No Exceptions

Install the Apollo® DC4A / DCLF4A Lead-Free Double Check Valve Assembly to ensure code-compliant backflow protection on every job. With proven performance, robust construction, and ease of service, it's a go-to solution for professionals who demand the best in system protection.