The Maxim 6 inch Double Check Detector Backflow Preventer Assembly is engineered to prevent the reverse flow of fire protection substances and non-potable water into the potable water supply. This assembly guards against backsiphonage and backpressure, ensuring compliance with national plumbing codes and water authority requirements.

This compact and modular backflow preventer is ideal for protecting cross-connections identified as non-health hazards, such as those found in fire sprinkler systems and service line entrances with potential contaminants.

Components & Features

• Features a stainless steel body and single housing with access sleeve for enhanced durability and easy maintenance.
• Equipped with tri-link check valves for the lowest pressure loss.
• Includes BFG Shutoff type grooved gear operated butterfly valves with a tamper switch for inlet and outlet control.
• Furnished with a gallon per minute meter to detect underground leaks and unauthorized water usage.
• Supplied with four test cocks for verification.
• Features replaceable check disc rubber for extended service life.
• Compact construction allows for installation in smaller vaults and enclosures.
• Approved for horizontal or vertical installation, guided by the flow arrow on the assembly.

Installation Considerations

• Maintain adequate clearance around the valve for inspection, testing, and servicing.
• A minimum 12 inch clearance is required between the lower portion of the assembly and the floor or grade.
• The valve must be protected from freezing.
• Floor drains of the same size should be provided in case of excessive discharge.