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.
• CONNECTIVITY – Converts coupling to male thread.
• DURABLE – Strong Acetal Copolymer Stem Adaptor Ø15mm x 1/2″BSP.

![John Guest® Stem Adaptor 15mm x 1/2"BSP - Pack of 2 [CAS15STA]](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS15STA__35602.1720557517.webp)
![John Guest® Stem Adaptor 15mm x 1/2"BSP - Pack of 2 [CAS15STA] - Image 2](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS15STA_STRAIGHT_DFC1832886__62982.1743590107.webp)
![John Guest® Stem Adaptor 15mm x 1/2"BSP - Pack of 2 [CAS15STA] - Image 3](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS15STA_PIC3_DFC1832884__83594.1743590107.webp)
![John Guest® Stem Adaptor 15mm x 1/2"BSP - Pack of 2 [CAS15STA] - Image 4](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS15STA_PIC2_DFC1832883__29827.1743590108.webp)
![John Guest® Stem Adaptor 15mm x 1/2"BSP - Pack of 2 [CAS15STA] - Image 5](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/CAS15STA_GROUP_DFC1832887__74377.1743590408.webp)


