John Guest Stem Adaptor 15mm x 3/8" – Metric to Imperial Push-Fit Adaptor

John Guest Stem Adaptor 15mm x 3/8" – Metric to Imperial Push-Fit Adaptor

The John Guest 15mm x 3/8" Stem Adaptor is designed to provide a simple transition between 15mm metric pipework and 3/8" imperial push-fit systems.

Ideal for professional drinks dispense, beer cooling, beverage, gas and compressed air systems, the adaptor allows equipment and fittings using different pipe sizes to be connected without threaded adaptors or flexible hose.

The stem end pushes directly into a compatible push-fit fitting, providing a compact method of converting between the two connection sizes.

15mm to 3/8" Stem Adaptor

This fitting is particularly useful in draught dispense installations where 15mm cooling or supply pipework needs to connect with equipment using 3/8" connections.

It provides a straightforward transition between metric and imperial push-fit systems while keeping the installation compact.

Key Features

• Genuine John Guest fitting
• 15mm x 3/8" Stem Adaptor
• Converts between metric and imperial connection sizes
• Push-fit connection
• Compact design
• Quick installation and removal
• Suitable for compatible drinks dispense systems
• Suitable for beer cooling pipework
• Suitable for compatible beverage systems
• Suitable for compatible gas and compressed air systems
• Ideal for professional cellar and bar installations

Connection Sizes

• Metric Connection: 15mm
• Imperial Connection: 3/8"
• Type: Stem Adaptor
• Manufacturer: John Guest
• Application: Metric to imperial pipework conversion
• Quantity: 1 adaptor

What is a Stem Adaptor?

A stem adaptor differs from a standard straight connector because one side incorporates a smooth stem designed to push directly into a compatible push-fit fitting.

This allows the connection size of an existing fitting to be changed without adding a longer combination of adaptors.

Always check which side of the adaptor is the stem and which side accepts tubing before installation.

Suitable For

Common applications include:

• Draught beer systems
• Drinks dispense installations
• Beer cooler pipework
• Beer python systems
• Chilled water systems
• Cellar installations
• Beverage equipment
• Compatible gas systems
• Compatible compressed air systems

Metric to Imperial Conversion

Professional draught dispense systems frequently use a combination of 15mm metric and 3/8" imperial pipework.

This John Guest stem adaptor provides a convenient way to transition between these connection sizes when installing coolers, pumps, manifolds and other compatible dispense equipment.

Working Pressure & Temperature

Manufacturer specifications provided for the fitting include:

• Maximum 150 PSI at 21°C / 70°F
• Maximum 60 PSI at 60°C / 140°F

Actual permitted working pressure will also depend on the pipe material, fluid or gas being used, operating temperature and overall system specification.

Important

This is a stem adaptor, not a conventional straight equal connector. The stem side is designed to push into a compatible push-fit fitting.

Always confirm the required 15mm and 3/8" connection arrangement against your existing pipework and fittings before ordering.