John Guest Drinks Grey Acetal Stem Enlarger

This fitting is designed to increase the diameter of an imperial push-fit connection within drinks dispense and water treatment systems. It allows a smaller line size to be stepped up to a larger outlet line size without replacing the existing fitting assembly. This enlarger provides a straightforward solution when system upgrades require increased flow capacity, such as extending beer lines, upgrading gas feeds or modifying beverage dispense layouts. Both ends feature John Guest push-fit technology, enabling fast installation and immediate leak-tight performance without tools, hot works or sealing agents.

Manufactured from strong acetal copolymer with a nitrile O-ring and stainless steel collet teeth, the fitting delivers an airtight connection while maintaining superior flow characteristics. The secure collet cover helps prevent accidental disconnection and ensures reliable pipe retention without deformation or internal restriction.

Suitable for potable liquids, food grade liquids and inert gases, the enlarger can be used on N2, CO2 and mixed gas dispense lines in accordance with recognised industry codes of practice. It is also appropriate for air, pneumatic and vacuum applications up to 16 bar for air. Fully demountable, the fitting supports efficient maintenance and future system modifications in busy pub and bar environments. All John Guest fittings are manufactured and assembled in the UK.

• Line size conversion: Increases imperial OD tubing to a larger outlet size.
• Push-fit technology: Tool-free installation with instant leak-tight sealing.
• Secure collet design: Stainless steel teeth grip pipe without distortion.
• Superior flow performance: Maintains internal bore for consistent dispense pressure.
• Food grade suitability: Suitable for potable liquids and beverage systems.
• Gas compatible: Appropriate for CO2, nitrogen and mixed gas lines.
• Fully demountable: Enables easy servicing and system reconfiguration.
• UK manufactured: Produced and assembled to consistent quality standards.