How to Set Up a Workshop Air Line

A good air line delivers steady pressure to every tool. A poor one loses pressure, collects water and leaks. Here is how to plan it.

Choose the right pipe

• Use pipe made for compressed air, such as aluminium, galvanised steel, copper or purpose made air line systems.
• Do not use ordinary PVC or other plastics not rated for compressed air. They can shatter if they fail.

Size it generously

Narrow pipe causes pressure drop, especially over longer runs. As a rule, go a size up from what looks necessary. Common choices are 1/2" for a small garage, and 3/4" or 1" for larger workshops or longer runs.

Plan the layout

• Run the main line along the wall with a slight slope away from the compressor
• Put a drain point at the lowest end so water can be removed
• Take drop points from the top of the main line, not the bottom, so water does not run down to your tools
• Where possible, loop the main line to even out the flow

Add air treatment

• A filter and regulator at each work area
• A dryer after the compressor if you spray or have sensitive tools
• A lubricator only where the tool needs it

Finish with good fittings

Use quality quick release couplings at each drop and seal threaded joints properly. Our guides on BSP threads and fixing leaks help here.

Planning a new air line? Call us on 021 435 5424 or visit Unit 705, Euro Business Park, Little Island, Cork (T45 NN60).