JG Speedfit brass stop valve for shutting off the flow of water to an entire system in the event of an emergency or for maintenance work. To install, simply push the pipe fully on to the valve. To demount the connection, push the collet towards the body of the push-fit fitting and pull the pipe to release. The JG Speedfit brass stop valve is up to 40% faster to install than traditional methods and is easier to use in confined spaces by removing the need for hot works and tools. Designed, manufactured and assembled in the UK. Hands screw mains stop valve Durable DZR brass body Instant push-fit connection Install and demount in seconds without tools Safe flame-free installation, with no hot works, glue or flux Grip & Seal collet with stainless steel teeth and main O-Ring seal Compatible with Speedfit PEX and polybutylene plastic pipe (inserts required) and copper pipe Suitable for central heating systems only