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AIRLINE NON RETURN VALVE

AIRLINE NON RETURN VALVE

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£2.99 Stock : 5 Product Code: 42/503P Our Ref No : 3421
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A non return valve (check valve) is used to stop water siphoning from the aquarium into an air pump positioned below the water level.
Fits standard 4/6mm diameter airline.
Not designed to be used with ozone or carbon dioxide.