This Maxim™ 4 inch double check detector backflow preventer assembly is engineered to prevent the reverse flow of fire protection substances and non-potable quality water from entering the potable water supply. It protects against backsiphonage and backpressure in accordance with national plumbing codes and water authority requirements, making it ideal for non-health hazard cross-connections like fire sprinkler systems and service line entrances.

Features

• Features a compact modular design with a single access sleeve for simplified maintenance.
• Approved for horizontal or vertical installation, aligning with the direction of the flow arrow on the assembly.
• Constructed with a stainless steel body, tri-link check valves, grooved gear operated butterfly valves with tamper switch, and four test cocks.
• Includes a gallon per minute meter for detecting underground leaks and unauthorized water usage.
• Replaceable check disc rubber for extended service life.
• Compact construction permits installation in smaller vaults and enclosures.
• The tri-link check valve assembly ensures the lowest possible pressure loss.
• Stainless steel construction provides long-term corrosion protection and maximum strength.

NOTICE: The information contained herein is not intended to replace the full product installation and safety information available or the experience of a trained product installer. You are required to thoroughly read all installation instructions and product safety information before beginning the installation of this product.