4mm Aquarium Non-Return Valve (NRV)

This aquarium non-return valve, also called an NRV or check valve, allows flow in one direction and helps prevent aquarium water from back-siphoning towards an air pump when the pump stops.

Product details

• Type: one-way airline check valve.
• Listed airline size: 4mm.
• Purpose: help prevent water backflow towards an air pump.
• Colour: may vary.

Check installation and compatibility

Follow the valve and air-pump installation instructions, check the required flow direction and confirm that the valve fits your tubing. A non-return valve does not replace the other safety precautions specified by your equipment manufacturer.

For a CO2 setup, confirm that the specific valve is suitable for your equipment and operating pressure before use.

Contact Wazeer's Aquariums for help choosing the correct valve for your setup.