Water/Air Silicone Tubing – 12.5 mm OD × 8.4 mm ID

Laser Machine Tubing & Hoses

Water/Air Silicone Tubing – 12.5 mm OD × 8.4 mm ID

This flexible silicone water and air tubing provides a practical replacement solution for compatible CO2 laser engraving and cutting machine cooling systems. Featuring a 12.5 mm outer diameter (OD) and 8.4 mm inner diameter (ID), it is particularly useful for external cooling-water connections between a laser machine and its water chiller.

Constructed from flexible silicone, this tubing can accommodate curved routing paths and appropriately sized hose fittings. It may also be used for compatible air-transfer applications when operating requirements are suitable. Sold by the foot, it allows you to purchase the length needed for laser machine maintenance, repairs, and replacement.

Key Features

• Flexible silicone tubing for compatible CO2 laser cooling-water and air systems
• 12.5 mm outer diameter and 8.4 mm inner diameter
• Suitable for external water connections between compatible laser machines and chillers
• Flexible construction helps accommodate bends and curved routing paths
• Can stretch over appropriately sized fittings when permitted by the installation requirements
• May be used for compatible air-transfer applications when pressure and material requirements are appropriate
• Practical replacement for worn, damaged, or aging cooling-water tubing
• Sold by the foot for convenient laser machine maintenance and repairs

Product Specifications

Product Type	Water/Air Tubing
Material	Silicone
Outer Diameter (OD)	12.5 mm (Approximately 0.492")
Inner Diameter (ID)	8.4 mm (Approximately 0.331")
Wall Thickness	Approximately 2.05 mm (Calculated from Listed Diameters)
Construction	Flexible Silicone Tubing
Primary Application	External Laser Machine Cooling-Water Lines
Additional Application	Compatible Air-Transfer Lines
Typical Connection	Laser Machine Water Inlet/Outlet to Water Chiller
Unit of Sale	Per Foot
SKU	263
Quantity	1 = 1 Foot of Tubing

How Water/Air Silicone Tubing Works

CO2 laser machines rely on cooling-water circulation to help regulate laser tube temperature during operation. Water tubing connects the laser tube and machine plumbing to an external chiller or other suitable cooling equipment, allowing water to circulate through the system.

This silicone tubing features an 8.4 mm internal passage for water or compatible air applications. Its flexible construction helps accommodate connections between equipment while allowing the hose to follow curved routing paths without requiring rigid plumbing.

Proper tubing dimensions, secure fittings, and unrestricted water circulation are important for reliable laser operation. Incorrect tubing selection, loose connections, or restricted flow can affect cooling performance and potentially damage laser components.

External Laser Chiller Connections

This tubing is particularly useful for connecting a compatible laser machine's external water inlet and outlet to its cooling equipment. Flexible silicone allows the tubing to be routed between the machine and chiller without requiring rigid connections.

Silicone's flexibility can also help when installing tubing over properly sized metal or plastic hose fittings. However, a secure connection depends on the fitting dimensions, tubing condition, installation method, and any required clamps or retainers.

Before operating the laser, verify that all cooling-water connections are secure, inspect for leaks, and confirm proper water circulation through the laser tube.

Silicone vs. Reinforced Vinyl Tubing

Silicone tubing is generally more flexible than standard vinyl tubing, making it useful for external water connections that require bends or changes in direction. Its flexibility may also simplify installation on compatible fittings.

Reinforced vinyl tubing contains additional structural reinforcement that can help resist hose expansion under pressure. For applications involving elevated pressure, reinforced tubing may be preferable when its verified working pressure rating meets the system requirements.

Rabbit Laser USA also offers reinforced vinyl tubing measuring 13.75 mm OD × 9.4 mm ID. This is a different size from the 12.5 mm OD × 8.4 mm ID silicone version, so the two should not be considered interchangeable without verifying the connection dimensions.

Confirm Compatibility Before Ordering

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

• Existing tubing inner and outer diameters
• Water chiller inlet and outlet fitting dimensions
• Laser machine water connection and hose barb sizes
• Required tubing length and routing path
• Cooling system pressure and temperature requirements
• Any required hose clamps, retainers, or fitting adapters

A matching outer diameter alone does not guarantee compatibility. Confirm both the inner and outer tubing dimensions before ordering. Specific pressure and temperature ratings have not been established for this tubing, so suitability for demanding applications should be verified before installation.

Installation & Safety

Before replacing tubing, turn off the laser machine and connected cooling equipment. Drain water where necessary and verify that the replacement tubing matches the intended connection. Cut the tubing cleanly to the required length and secure it using compatible fittings and any necessary hose clamps or retainers.

Route the tubing to avoid sharp bends, kinks, excessive tension, heated surfaces, and moving components. After installation, inspect all connections for leaks and verify proper water circulation before operating the laser. Never operate the tubing beyond its verified working pressure or temperature limits.