In gas or water supply networks, installed buried in the ground. -Material: PE100, SDR 11 (ISO S5). -10 bar gas / 16 bar water (calculated for a temperature of 20°C) -according to EN 1555-1:2011. ISO 4427-3. ISO 4437-3 -dimensions according to EN 12201-3:2011+A1:2012, EN 1555-3:2010+A1:2012 -manufacturing method: injection moulding -the strength of the electrofusion fitting is embedded in the material -the inner surfaces of the fittings are smooth, without grooves -welding temperature between -10°C and +45°C -welding voltage 40 V -4 mm connectors -welding indicators with limited displacement -two welding zones Welding must be carried out by authorized welders using suitable equipment and in compliance with the welding procedure.