General description The John Guest Speedfit Brass Stem Adaptor 15mm X 1/2 is a versatile solution that converts Speedfit push-fit connections to a female thread appliance. This adaptor is designed for quick and easy installation, especially in confined spaces, eliminating the need for hot works, glue, or flux. Technical specifications Type: Brass female stem adaptor Size: 15mm X 1/2 Installation: Flame-free, no hot works required 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.