The OWS Windmill Valve Kit gives you the control you need to balance airflow between two diffusers or zones with ease. Whether you're running a windmill or electric aeration system, this valve ensures that no diffuser is overworked while others are under-supplied. By regulating airflow, you'll create even oxygen distribution-critical for supporting fish health, preventing stagnant zones, and maintaining overall water quality. Built from high-quality, corrosion-resistant brass, this valve is engineered to perform in demanding outdoor conditions. It installs easily into existing airline setups, providing flexibility without the need for costly system overhauls. For pond owners and aquaculture managers who demand simplicity, durability, and precise control, this selector valve is the tool that keeps your aeration system balanced and effective. When your water is your investment-whether it's fish health, property value, or peace of mind-the right valve makes all the difference.