John Guest Speedfit brass male stem adaptor that converts Speedfit push-fit to a male thread appliance. The John Guest Speedfit brass male stem adaptor is quicker and easier to install in confined spaces than traditional methods as it eliminates the need for hot works. Designed, manufactured and assembled in the UK. Safe flame-free installation, with no hot works, glue or flux Compatible with Speedfit PEX and polybutylene plastic pipe (inserts required) and copper pipe Suitable for hot and cold water and central heating systems