We tested the NEWSONG Raufoss ABC nylon air brake tee—watch a full bench demo of the PA12-GF50 push-in 3-way fitting: 6–15 mm tube assembly in under 5 seconds, 10 bar leak test, 250 N pull-out check, and 100,000-cycle durability. See how the double NBR O-ring seals, how to release and reuse the tee, and what to inspect before installing on truck, trailer, ABS/EBS, or air suspension lines.