This is a single-wall polypropylene pipes system for indoor use. It is compatible with the main boilers on the market. Minimum thickness of 2 mm and working temperature up to 120°C. Pressure tightness in H1 ((≤ 5.000 pa) with a possibility to install with centring for existing chimneys. The range consists of 124 articles. The diameter ranges from 50 to 125 mm in white polypropylene.