Aquarium Air Pump One-Way Check Valves (10pcs, Non-Return, Prevents Back-Siphon)

Protect your air pump from water damage with these essential One-Way Check Valves for aquariums! 🔒

• 🔒 Non-Return Design - one-way valve allows air to flow forward but blocks water from siphoning back to the pump.
• 💧 Prevents Water Damage - essential protection for air pumps placed at or below water level during power outages.
• 📦 10-Pack Value - enough valves to protect all outlets on multiple air pumps throughout your fish room.
• 🔗 Standard Airline Fit - fits all standard 4mm aquarium airline tubing used with any air pump brand.
• 🔧 Tool-Free Install - simply press-fit onto airline tubing in seconds, arrow indicates correct flow direction.