CO2 Tubing Connector — Straight Joiner

This CO2-resistant straight barbed joiner is a simple but essential accessory for connecting two sections of 4mm CO2 airline tubing neatly and securely. Common applications include extending an existing CO2 run, joining a replacement section of tubing, or reconnecting tubing after cutting it to install a new inline component such as a check valve or bubble counter. The joiner is manufactured from CO2-proof acrylic or brass and features two barbed ends that grip the inside of the tubing to form a reliable gas-tight seal without adhesive or clamps. The small and discreet form factor allows it to be positioned at any point along the CO2 tubing run.