MEANLIN DN15 Brass Vacuum Breaker Valve,Male Thread,Anti-Backflow Preventer

• Negative Pressure Automatic Relief Function – Designed to open for air intake when pipeline vacuum negative pressure forms, helps relieve negative pressure to reduce water backflow and pipeline siphon issues.
• Integrated Forged Brass Body – Thick brass casting construction designed to offer resistance to rust, pressure, and aging for use in hot and cold water pipeline environments.
• Male Thread Installation Interface – Standard external thread at the bottom for direct threaded installation on water heater, boiler, and heating equipment outlets.
• Side Outlet Vent Structure – Side exhaust port for air intake, top hexagonal plug allows convenient internal cleaning and routine maintenance access.
• Wide Range of Protection Scenarios – Suitable for water heaters, solar water supply pipelines, boiler equipment, and floor heating pipes to help protect against backflow caused by vacuum negative pressure.

★Product Specification: Product Type: Brass Vacuum Breaker Valve Specification: DN 15 Valve Body Material: Forged Brass Connection: Bottom Male Thread Structure: Side Air Outlet, Top Hexagonal Detachable Cleaning Plug Application: Water heater anti-backflow, solar water pipeline, boiler outlet, heating system, tap water pipeline anti-siphon ★Product Feature: ✔ Automatic Vacuum Elimination: Real-time break pipeline negative pressure, avoid equipment internal water backflow caused by siphon, protect heating container inner liner. ✔ Corrosion Resistant Brass Construction: Resist water scale and oxidation from long-term hot water use, extend valve service life. ✔ Easy Installation: External thread direct connection, no extra adapter required, save pipeline construction cost. ✔ Maintainable Design: Removable top hex nut for cleaning internal impurities to avoid blockage affecting vacuum breaking performance. ✔ Compact Elbow Layout: Small volume, adapt to narrow installation space of equipment outlet end. ★Attention! Install vertically at the highest outlet position of the pipeline or equipment for optimal vacuum breaking effect. Wrap PTFE tape evenly on the male thread for thread sealing to prevent water seepage at the joint. Regularly disassemble the top plug to clean sediment and scale inside the valve body. The side vent must not be blocked to ensure smooth air intake for negative pressure relief. Applicable medium is clean tap water and hot water; prohibit use with corrosive liquids.