If you are looking for a fitting that will work well with your air system then a strong, aluminium Y connector should do the job perfectly. This type of connector, a Ducting Y piece, is ideal for attaching ducting and hoses together to enable extraction from multiple areas. The connector is designed so that ducting or hoses fit over it and can then be secured with hose clamps. It's important to ensure the clamps are tightly secured or you are likely to get leaks that won't help with your air distribution. These connectors are sturdy and strong and they also come in a range of larger sizes should you need that extra diameter.