John Guest fitting CI320814s - 1/2" BSP Female x 1/4" Push fit. This fitting securely connects 1/4" (6.35mm) tubing to the adapter. The component is NSF Standard and WRAS Approved, ensuring a high-quality, reliable, leak-free connection. It screws onto 1/2" BSP fittings to provide a 1/4" push fitting. Manufactured by John Guest, it is ideal for obtaining a 1/4" water feed from a 1/2" / 15mm BSP thread. The highest quality fitting meets NSF standard and is WRAS Approved.