How to Choose John Guest Air Supply System Fittings
Plan a compressed-air pipe run by matching tube outside diameter, thread size and fitting function — straight connection, elbow, tee, adaptor or outlet.
Three dimensions prevent most mistakes
Confirm the tube outside diameter, the threaded connection and the fitting geometry before you order.
Match the tube outside diameter
Push-fit systems are selected by the tube OD, so verify the actual tube size used in the installation.
Identify threaded ports
Where a fitting joins a machine, filter or receiver, confirm the thread size and whether the connection is male or female.
Plan the route
Use straight adaptors, elbows, tees and other fittings to create a clean layout without unnecessary strain on the pipe.
Prepare tube correctly
Make clean, square cuts and follow the fitting manufacturer installation instructions for insertion and release.
Building a reliable compressed-air distribution layout
A modular push-fit airline can be quick to install, but each joint still needs the correct tube size, thread and orientation. Planning the route before ordering reduces unnecessary adaptors and awkward pipe runs.
Information to check before ordering
- Tube outside diameter
- Thread size and thread form
- Male or female threaded connection
- Straight, elbow, tee or reducer function
- Required mounting or wall outlet arrangement
- System pressure and manufacturer suitability
Avoid the expensive shortcut
Similar-looking products are not automatically interchangeable. Use the product reference and application information together rather than selecting from appearance alone.
Choose by the job, not just the product name
These broad groups explain the main differences to think about before you jump into the product directory.
Straight adaptors & couplings
Used for in-line joins or transitions into threaded equipment. Confirm both connection ends.
Elbows & tees
Allow changes of direction and branch connections while keeping the pipe layout compact and organised.
Threaded & wall connections
Used to interface the push-fit airline with filters, receivers, machines or fixed outlet points. Match the thread exactly.
Search the 75 products in this guide
Search by model, part number, size or a word from the product description. The links below take you directly to the individual product pages.
Tip: a distinctive part-number fragment is usually the quickest search.
John Guest airline fittings (31)
Adaptors & couplings (23)
Elbows & angle fittings (13)
Tees & branch fittings (8)
Quick answers before you choose
Is push-fit size based on tube bore?
No. Push-fit fittings are normally selected to match the tube outside diameter.
Can BSP and BSPT threads be treated as identical?
Do not assume so. Confirm the exact thread form and sealing method required by the mating component.
What is the best way to cut push-fit tube?
Use a suitable tube cutter to produce a clean, square cut and follow the fitting manufacturer installation guidance.
Not sure which one you need?
Send Tanair the product reference, vehicle or equipment details and a clear photograph where useful. We can help you narrow the correct option before you order.