Sera CO₂ Non-Return Valve – Safety Check Valve for Aquarium CO₂ and Air Systems (2 pcs) · --

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About this product

The Sera CO₂ Non-Return Valve is a high-quality safety accessory designed to prevent water backflow into your CO₂ system or air pump. Made from durable plastic and engineered with precision, this valve ensures reliable one-way flow — protecting sensitive equipment like CO₂ regulators, diffusers, and air pumps from potential damage caused by back-siphoning. Each pack includes two precision non-return valves , making it an excellent choice for both CO₂ and air applications in aquariums. Key Features: Prevents water backflow into CO₂ regulators or air pumps Essential for pressurised CO₂ systems and air lines Durable, high-quality construction for long-term reliability Compact and lightweight – fits neatly in any setup Easy to install – simply connect inline with standard 4/6 mm tubing Suitable for freshwater and marine aquariums Pack contains 2 non-return valves Usage Tips: Install the valve vertically with the arrow pointing towards the aquarium to ensure correct gas flow direction. Use one valve for your CO₂ line and one for your air pump to maximise protection. Check occasionally for dust or salt buildup and replace when needed.

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