General description The John Guest Speedfit Brass Stem Adaptor 15mm X 1/2 is a high-quality brass male stem adaptor designed to convert Speedfit push-fit connections to a male thread appliance. This adaptor offers a quick and easy installation process, especially in confined spaces, eliminating the need for traditional hot works. Technical specifications Size: 15mm X 1/2 Material: Brass Compatibility and accessories Compatible with Speedfit PEX and polybutylene plastic pipe (inserts required) Compatible with copper pipe Usage Suitable for hot and cold water systems Suitable for central heating systems Other information Designed, manufactured, and assembled in the UK Safe flame-free installation, with no hot works, glue, or flux required