Pond Aerator Diffuser Backflow Valve | 3/8-Inch & 1/2-Inch

Check Valve

Protect your pond aeration system with the Outdoor Water Solutions Diffuser Backflow Valve, available in 3/8-inch and 1/2-inch sizes. This essential pond aerator check valve prevents water from flowing back into the airline and compressor, helping maintain reliable system performance while extending the life of your aeration equipment.

When an aeration system shuts down or experiences a pressure drop, water can travel back through the airline, potentially damaging compressors, restricting airflow, and causing difficult startups. The OWS Backflow Valve eliminates this risk by allowing air to flow in only one direction, protecting your investment and ensuring dependable operation.

Designed for quick installation, the valve threads directly onto standard diffusers with 1/2-inch NPT connections, requiring no special tools or additional adapters. Its durable, weather-resistant construction is built for continuous outdoor use in residential ponds, farm ponds, lakes, fisheries, and commercial water features.

By preventing backflow, the valve also helps reduce compressor wear, minimize the risk of freezing in colder climates, and maintain consistent airflow for improved oxygen transfer and overall pond health.

Features & Benefits

• Available in 3/8-inch and 1/2-inch sizes
• Prevents water from flowing back into airlines and compressors
• Protects compressors from unnecessary wear and potential damage
• Helps maintain consistent airflow and reliable aeration performance
• Reduces startup issues following system shutdowns
• Minimizes the risk of frozen airlines in cold weather
• Threads directly onto 1/2-inch NPT diffuser connections
• Quick, tool-free installation with no additional adapters required
• Durable construction designed for long-lasting outdoor performance
• Compatible with Outdoor Water Solutions and most standard pond aeration systems

A simple upgrade with long-term benefits, the Outdoor Water Solutions Diffuser Backflow Valve helps protect your aeration system, reduce maintenance costs, and ensure dependable pond aeration season after season.

Markers and other Accessories

• Backflow Valve with Threaded Coupler  -  3/8" & 1/2"
• Backflow Valve with Threaded Coupler -  5/8"