Plastic CO2 Check Valve
£1.99
Plastic CO2 Check ValveKey Facts
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Prevents water siphon / backflow.
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For 4mm internal diameter tubing.
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Connects 'in-line' with aquarium tubing.
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Simple push-fit design.
Description
A check valve (non-return valve) prevents water from siphoning / back-flowing down aquarium tubing when pressure is turned off. For example, when the air pump or CO2 system is switched off. Without this device water will siphon down the tubing an enter your electrical equipment.
Instructions
- Cut your CO2 tubing in the position you would like check valve.
- Direction of flow can be determined by looking at the valve, you'll see the red plastic is moulded to one end of the unit - that is the input. The other non-moulded end is the output.
- Push CO2 tubing onto corresponding inlet/outlet as far as you can.
- Tip: Softening the tubing in freshly boiled water will make it easier to push the tubing onto the valve.
- Click here to read the full check valve setup guide
Customer Reviews
Average Rating
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Aj D.
22nd Feb 2025Works well, no more water siphoning back into the tubing. Works well, no more water siphoning back into the tubing. -
Ian G.
29th Oct 2024Does exactly what it's supposed to Does exactly what it's supposed to -
Andrew K.
27th Oct 2024Super easy to fit into the tubing and works perfectly to keep water from siphoning back Super easy to fit into the tubing and works perfectly to keep water from siphoning back -
Jonny S.
11th Dec 2023Feels a little flimsy but seems to work okay Feels a little flimsy but seems to work okay -
Sam R.
28th Jan 2023Unfortunately it had a leak in the join area, fortunately I had an old spare from an air pump. Me and my dad both use a variety of there equipment and have never had a problem, sometimes these things just happen. Unfortunately it had a leak in the join area, fortunately I had an old spare from an air pump. Me and my dad both use a variety of there equipment and have never had a problem, sometimes these things just happen. -
Stelios D.
17th Oct 2022Very good easy to install. Checked no water returns. Very good easy to install. Checked no water returns. -
Paul T.
14th Jan 2022Works okay Works okay -
Cory M.
17th Nov 2021I know the co2 system has a bubble counter that has a check valve, but I bought this extra for extra safety. Seems to work well I know the co2 system has a bubble counter that has a check valve, but I bought this extra for extra safety. Seems to work well -
Robert S.
18th Sep 2021You get what you pay for… simple & plastic You get what you pay for… simple & plastic -
Richard T.
17th Jun 2021I've just bought another full kit with an in-line diffuser. I've had my first kit for 2 years and it's perfect, with absolutely no problems. Thanks very much. I've just bought another full kit with an in-line diffuser. I've had my first kit for 2 years and it's perfect, with absolutely no problems. Thanks very much.
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