?Designed, manufactured and assembled in the UK by John Guest Speedfit. Connectors use a grip then seal collet arrangement. The female coupler is ideal for the connection of taps, and Toilets. Simply push the fitting fully onto the pipe and turn onto the thread. Should the need arise to demount the connection unlock the nut push the collet towards the body of the fitting and pull the pipe to release. Additional Details ------------------------------ Bullet point: PRECISION PLUMBING DESIGN: The John Guest female flare connections (FFL) are designed for precise plumbing systems, following NPT flare measurements for compatibility with standard pipe fittings. Made from high-quality acetal, these durable John Guest fittings ensure reliable performance. Ideal for tubing connectors and pipe connectors, the PM4508F4S model offers seamless connection. Suitable for flare tool use, these 1/4 flare fittings are ideal for threaded tubes and more. Product description: ?Designed, manufactured and assembled in the UK by John Guest Speedfit. Connectors use a grip then seal collet arrangement. The female coupler is ideal for the connection of taps, and Toilets. Simply push the fitting fully onto the pipe and turn onto the thread. Should the need arise to demount the connection unlock the nut push the collet towards the body of the fitting and pull the pipe to release.