5pcs Non-Return One Way Check Valve For 4mm Aquarium Fish

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With this anti-backflow check valve in place, the water can never reach your pump to damage it. Save yourself the trouble of replacing the pump earlier than you need to. Extend your pump's lifetime with this check valve.

Description:

• Simple and indispensable solution for your aquarium air pump against air backflow
• Prevent water from back-siphoning into your water causing water damage
• Overall Length: Approx. 42 mm
• Fits 4mm /
• Material:
• Color: Green or black housing,

Package Includes:

• 5 Valve

check valve pump aquarium anti-backflow 5pcs