Specialist Aquatics Dual Check Air Valve for Aquarium Air Pumps – Prevents Backflow, Protects Pump & Tank – Fits 4.8 mm Tubing,

🔒 Dual Check Protection – Prevents reverse water flow into air pumps during power loss 💧 System Safety – Shields pumps from water damage and prevents tank siphoning 🧩 Metric-Compatible Fit – Designed for 4.8 mm (3/16 inch) ID air tubing 🔍 Compact & Lightweight – Measures 5.1 cm x 3.6 cm, weighs only 7 g 🐟 Versatile Use – Suitable for freshwater, saltwater, and planted aquariums 🛠️ Quick Installation – Inline design for fast, hassle-free setup