Polyplumb 10mm straight coupler / connector PB010, grey push-fit plastic plumbing fitting by Polypipe.
Push-fit Polyplumb fittings feature a one step jointing process and a high performance stainless steel grab ring within the fitting, ensuring superb joint integrity. Use Polyplumb with Polypipe grey polybutylene pipe, or you can combine Polyplumb fittings and copper pipe.
Polypipe recommends the use of a metal or plastic pipe stiffener when used with plastic pipe.
Polyplumb is suitable for use in most plumbing and heating installations including hot and cold water and underfloor heating applications.
More information and instructions are available from the manufacturer www.polypipe.com