Push-fit Hep2O includes unique features that enable quick and easy installation with a secure fitting. It is the only push-fit plumbing system with joint recognition, secure demounting and a 50 year guarantee. The system is compatible with both plastic and copper, making it ideal for new build and refurbishment projects. Hepkey Release Tool set available (code 20940). This hot and cold flexible push-fit plumbing system offers a leak free connection. It is BS EN 7291 parts 1 and 2, WRAS approved, and KIWA certified. Enjoy secure and easy demounting with the HepKey system and a 50 year industry leading guarantee. Minimum operating temperature is 5 degC. Maximum operating temperature is 114 degC. Maximum operating pressure at minimum temperature is 12 BAR. Maximum operating pressure at maximum temperature is 3 BAR.