Always use a JG Speedfit cold water service pipe insert push-fit fitting when connecting Speedfit MDPE fittings to a compression fitting. Inserts play a vital role in providing extra support to pipework, ensuring that the ends of the pipe are kept nice and round, and minimising any loss of shape that can occur when cutting. Designed and manufactured in the UK. Enhances sealing for a securer connection Maintains structural integrity of the pipe connection Compatible with MDPE pipe Suitable for cold water use only