1 metre 10mm Polyplumb polybutylene barrier pipe
Buy as much as you like (up to 50 metres) and get it all in one big length of pipe.
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.
Polyplumb 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.
Polyplumb instruction manual.