How should I install this check valve?

Cut the CO2 hose in 2, make sure you cut nice and straight. Then just push the CO2 hose in the check valve until it can’t go any further. Make sure the arrow on the valve is pointing towards the aquarium.

How do I remove the CO2 hose?

This is easy: just push on the “tab” of the valve with one hand and pull out the CO2 hose with your other hand. If it’s a little stiff, you can pull the hose while “sliding”.

Which CO2 hose fits the Pro Check Valve?

Only our PU hose works with this checkvalve. Our flexible CO2 hose does NOT fit because it is too soft.

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CO2 check valves

Pro check valve

Plastic check valve