![John Guest® Wall Box 3 x 1/2"BSP Connection [CAS12WB]](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS12WB_DFC1162725__15768.1720585583.webp)
![John Guest® Wall Box 3 x 1/2"BSP Connection [CAS12WB] - Image 2](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS12WB_ACT_IN_SITU_DFC1781822__76078.1733907612.webp)
![John Guest® Wall Box 3 x 1/2"BSP Connection [CAS12WB] - Image 3](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS12WB_ACT_IN_USE_PIC2_DFC1781824__69718.1733907612.webp)
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![John Guest® Wall Box 3 x 1/2"BSP Connection [CAS12WB] - Image 6](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS12WB_ACT_IN_USE_PIC3_DFC1781825__12585.1733907614.webp)
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 water movement not meant for human consumption.
• MULTI-OUTPUT – Up to three 1/2″ outputs for connecting air lines or cable reels, enhancing system adaptability.
• SECURE CONNECTION – 1/2″ Female thread ensures a tight, reliable seal for air or water applications.
![John Guest® Wall Box 3 x 1/2"BSP Connection [CAS12WB]](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS12WB_DFC1162725__15768.1720585583-324x324.webp)