Multiplex Double Check Valve - 3/8" Male Flare (MFL) - Carbonator PartThe Multiplex Double Check Valve is a critical safety component for commercial soda fountain systems. Featuring 3 8" Male Flare (MFL) connections, this valve is designed to prevent the reverse flow of carbonated water into the potable water supply, protecting against contamination and "copper leaching" in plumbing lines. The "double" check design provides a redundant level of protection for industrial carbonator pumps, ensuring your facility remains