The PG inch-to-metric pneumatic union reducer connects inch-sized tubing to metric-sized tubing in a straight configuration. It provides a connection between the two tubing size systems in a pneumatic pipe installation.
Connection and size selection
- Product type: PG straight union reducer, inch to metric.
- Inch tube size options: 1/8", 5/32", 1/4", 5/16", 3/8" and 1/2".
- Metric tube size options: 4 mm, 6 mm, 8 mm, 10 mm and 12 mm.
- Pack quantity: 10 pieces.
Select the inch tube size and metric tube size that match the two tubes you need to connect. Refer to the available product selections for the size combination you require.
Common selection questions
What is this pneumatic reducer used for?
It is used to connect an inch-sized tube to a metric-sized tube in a pneumatic piping system.
Which sizes should I select?
Check both tube sizes before ordering, then choose the corresponding inch and metric options. Do not select a connection based only on a rounded inch-to-millimetre conversion.

