plastic non-return valve red check valve for aquarium

Check Valve:

This precision made valve is designed to protect aquarium air pumps by allowing air to pass freely only in one direction.

It prevents water being siphoned back into the air pump during power failure or whilst performing routine maintenance.

The port size of check vavle is 4mm.

Using Instructions:

1. Cut a suitable length of airline so that it can be easily connected to the air pump and aquarium filter or ornament.

2. Locate a convenient position in the airline tubing for the Check Valve and cut airline tubing.

3. Insert the Check Valve into the tubing so that the ARRow points towards the aquarium.

4.Check all airline is firmly attached.

5. Connect air pump to the mains supply.

1. What are ZHONGLE Ltd., specializing in?
As a China manufacturer, I specialize in air stone, fish net, and some plastic accessories. As you can see my machine pictures and the processing, these are my advantageous products.
2. Want to check quality before purchasing?
NO problem, I offer FREE SAMPLE service using your DHL account shipping to you.
3. What's ZHONGLE Ltd., warranty?
We offer one month warranty .
If there is any quality or packing problem,
you can return it back anytime in one month since the date of receipt.
Or we would like to ask you pictures about the problem, then put the candidate in the next order and ship with the next order to you together.
4. Don't know how to use? Or unsatisfied with the effect after buying?
Please check the instruction carefully, it can solve your problem.

1.To save your time and money ,we are very glad that you can buy all the aquarium items from us ,we will help arrange the shipping also

2. If any question, please let us know it in the first by E-mail or Telephone. We can deal with them for you in time.
3. We will send many new styles in every month to our old customers.
4. Offer our customers the best prices . Streamline the buying and paying processes.
5. Deliver goods to our customers all over the world with speed and precision .
6. Ensure the excellent quality of our products.