Description
• COMPREHENSIVE – One of a comprehensive range of high-quality components for the John Guest® Air Supply Ring Main System.
• QUICK – Install your own workshop compressed air ring main quickly, easily, and competitively with the CAS system of fast fit compressed air fittings.
• VERSATILE – Can also be used for drinking water movement.
• REDUCED CONNECTION – Reduces 28mm coupling to 15mm stem for adaptable flow adjustments in air and water systems.
• SEALS – Strong Acetal Copolymer Reducer ensures a leak-proof connection, maintaining integrity in both air and water applications.

![John Guest® Reducer 28-15mm - Pack of 2 [CAS2815]](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS2815__68478.1720557520.webp)
![John Guest® Reducer 28-15mm - Pack of 2 [CAS2815] - Image 2](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS2815_PIC2_DFC1883520__45534.1744296306.webp)
![John Guest® Reducer 28-15mm - Pack of 2 [CAS2815] - Image 3](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS2815_STRAIGHT_DFC1883524__80345.1744296307.webp)
![John Guest® Reducer 28-15mm - Pack of 2 [CAS2815] - Image 4](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS2815_PIC4_DFC1883523__47004.1744296307.webp)
![John Guest® Reducer 28-15mm - Pack of 2 [CAS2815] - Image 5](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS2815_PIC3_DFC1883522__21354.1744296307.webp)
![John Guest® Reducer 28-15mm - Pack of 2 [CAS2815] - Image 6](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS2815_GROUP_DFC1883525__01019.1744296604.webp)


