Water/Air Silicone Tubing – 6.5 mm OD × 3.6 mm ID

Laser Machine Tubing & Hoses

Water/Air Silicone Tubing – 6.5 mm OD × 3.6 mm ID

This silicone water and air tubing provides a flexible solution for compatible CO2 laser machine air-assist and water-transfer applications. Featuring a 6.5 mm outer diameter (OD) and 3.6 mm inner diameter (ID), it is suitable for replacing or routing tubing within laser engraving and cutting machines when the dimensions and operating requirements match.

Constructed from flexible silicone, this tubing is useful for routing air through the internal machine frame, including connections leading toward the laser head and air-assist nozzle. Its flexibility makes installation easier in areas with limited space or curved routing paths. Sold by the foot, it provides a convenient replacement option for routine machine maintenance.

Key Features

• Flexible silicone tubing for compatible laser machine air and water applications
• 6.5 mm outer diameter and 3.6 mm inner diameter
• Suitable for internal air-assist routing when matched with appropriate connections
• Flexible construction helps accommodate curved routing paths inside laser machine cabinets
• Can be used in compatible water-transfer applications when operating conditions are suitable
• Practical replacement for worn, damaged, or incorrectly sized existing tubing
• Sold by the foot for maintenance and replacement projects

Product Specifications

Product Type	Water/Air Tubing
Material	Silicone
Outer Diameter (OD)	6.5 mm (Approximately 0.256")
Inner Diameter (ID)	3.6 mm (Approximately 0.142")
Wall Thickness	Approximately 1.45 mm (Calculated from Listed Diameters)
Primary Application	Internal Laser Machine Air Lines
Additional Application	Compatible Water-Transfer Lines
Construction	Flexible Silicone Tubing
Unit of Sale	Per Foot
SKU	260
Quantity	1 = 1 Foot of Tubing

How Water/Air Silicone Tubing Works

CO2 laser machines rely on tubing to move air and cooling water between components. In an air-assist system, tubing carries air from the supply toward the laser head, where airflow helps clear smoke and debris from the cutting or engraving area.

This silicone tubing provides a 3.6 mm internal passage for air or compatible liquids. Its flexible construction helps accommodate routing around internal machine components while maintaining a connection between properly matched fittings.

For water-transfer applications, tubing dimensions and material properties must match the cooling system's requirements. Proper installation and suitable operating conditions are necessary to prevent leaks, restrictions, and interruptions in airflow or water circulation.

Silicone vs. Vinyl Tubing

Silicone tubing is generally more flexible than standard vinyl tubing, making it useful for installations where the hose must bend around components or pass through confined spaces. This flexibility can simplify routing and installation inside laser machine cabinets.

Vinyl tubing can also be suitable for air and water applications, particularly in fixed routing arrangements. However, each material has different flexibility, temperature, and pressure characteristics that should be considered when selecting replacement tubing.

This 6.5 mm OD × 3.6 mm ID silicone tubing is not the same size as our 6.1 mm OD × 4 mm ID vinyl tubing. The two products should not be considered interchangeable without confirming fitting dimensions and system requirements.

Confirm Compatibility Before Ordering

Before purchasing replacement silicone tubing, compare the following specifications with your existing tubing and laser machine:

• Existing tubing inner and outer diameters
• Hose barb, fitting, and connector dimensions
• Required tubing length and routing path
• System air or water pressure requirements
• Operating temperature and material compatibility
• Clearance around moving components and heated surfaces

A matching outer diameter alone does not guarantee compatibility. Confirm both the inner and outer diameters before ordering. The specific temperature and pressure ratings of this tubing have not been established, so suitability for demanding operating conditions should be verified before installation.

Installation & Safety

Before replacing tubing, turn off the laser machine and connected air or water equipment. Release system pressure and drain water where necessary. Cut the tubing cleanly to the required length and connect it using appropriately sized fittings and any required retainers.

Route the tubing to avoid kinks, pinching, moving components, and direct contact with hot surfaces. After installation, inspect all connections for leaks and verify proper airflow or water circulation before operating the laser. Never operate the tubing beyond its verified pressure or temperature limits.