QNHEAY RV Vacuum Breaker Check Valve – B&B 571

Upgrade your RV’s sanitary system with the QNHEAY Vacuum Breaker Check Valve, specifically engineered for the B&B Model 571. Crafted from high‑grade brass, this valve delivers superior durability and a longer service life compared to conventional plastic alternatives, ensuring reliable performance over countless trips.

Designed to keep your fresh‑water supply free from contamination, the valve effectively blocks sewage backflow into the toilet and other sanitary fixtures. By preventing reverse flow from the black water tank, it protects your RV’s water system from pollutants and maintains a clean, safe drinking source for you and your guests.

Installation is straightforward: mount the valve at least 6″ above the highest point of the waste tank within the black water tank flushing system. This simple step eliminates common issues such as valve leakage, floor moisture damage, and hissing noises, giving you peace of mind and a worry‑free travel experience.