Premium Blue Glass One-Way Check Valve for CO2 Systems – Ensures precise gas flow control in planted aquariums with leak-proof performance.
High-grade borosilicate glass construction resists corrosion and maintains clarity under constant water exposure. Precision-engineered silicone diaphragm guarantees silent operation and long-term durability.
Ideal for preventing backflow in CO2 diffusion setups – safeguards equipment from water damage while optimizing plant growth. Compact inline design integrates seamlessly with tubing (4/6mm).
Wholesale advantage: Bulk pricing available for aquarium retailers and hobbyists seeking professional-grade accessories at unmatched value.






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lgd***
Color:Blue;Size:Diameter 12mm;
$107.25
41 days ago
bji***
Color:Blue;Size:Diameter 13mm;
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22 days ago
ohb***
Color:Blue;Size:Diameter 15mm;
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fmw***
Color:Blue;Size:Diameter 17mm;
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exi***
Color:Blue;Size:Diameter 18mm;
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Color:Blue;Size:Diameter 22mm;
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Blue Type Aquarium Glass One Way Check Valve for Planted Tank CO2 System
$12$15.45-22.33%
Color:
Blue
Size:
Diameter 13mm
Diameter 22mm
Diameter 25mm
Diameter 18mm
Diameter 12mm
Diameter 17mm
Diameter 15mm
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