black pipe, extruded from high-density polyethylene compound type PE100. The PE100 compound is a homogeneous mixture of polyethylene, antioxidants, pigments and UV radiation stabilizers. Reference standard STF13 Valrom Industrie Company Technical Standard. Pipe diameters are standardized and their thicknesses comply with STF13. Use WaterKIT STF13 pipes are used for drinking water supply networks installed underground. Important: Cuts or scratches deeper than 10% of the wall thickness are sufficient to consider the pipe unusable and prohibit its use in pressurized applications. Joining STF13 pipes pipes are mechanically joined using WaterKIT compression fittings. Given the wall thickness, the pipes are not intended for fusion joining or butt welding. Service life of 50 years corresponds to an operating temperature of 20°C and for a working pressure equal to or less than the PN for which the pipe was manufactured. Approvals Technical approval and certificate for use in construction. Sanitary approval for use with drinking water.