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: SUPERIOR STRENGTH HEAT RESITANCE: Acetal copolymer offers superior strength and heat resistance compared to polypropylene, making these 3/8 quick connect hose fittings ideal for water filter and water purifier systems. Crafted with a food-grade nitrile O-ring, they ensure safe use in applications involving foodstuff and potable liquids. Additionally, they are compatible with air line quick connect fittings, air fittings, and pipe fittings, allowing them to be utilized in home improvement projects. 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.