Premium 4mm Aquarium Air Control Float Valve
High-precision brass core ensures smooth airflow regulation with zero leaks. CNC-machined body features corrosion-resistant chrome plating for long-term durability. Dual-purpose design functions as both a check valve and flow regulator, preventing backflow while fine-tuning oxygen levels. Compatible with 4mm tubing, ideal for aquarium air pumps, CO2 systems, and hydroponic setups. Industrial-grade silicone diaphragm maintains consistent pressure under high-frequency use. Tool-free adjustment knob allows instant flow calibration with fingertip control. Perfect for marine biologists, aquascapers, or DIY lab equipment requiring exact gas volume management. Bulk pricing available for commercial hatcheries and aquarium maintenance services. Universal 4mm connector works with standard airline tubing. Includes reinforced nylon mounting bracket for secure vertical/horizontal installation.