Branch Tees are the best way to lead off to a machine from a duct system. Having a smooth inner surface and a 45° angle there is no obstruction to the airflow. Also, these are available in a range of sizes to suit the duct and machine extraction outlet.
1 April 2014
Poor quality, bad design and expensiveThe seams are spot welded but leak and have to be sealed with silicone caulk. Some have very badly applied expoxy resin to try and seal them inside but this leaks