HOBAS GRP Sewer Pipe Systems are highly resistant to corrosive substances and therefore ideal for piping municipal wastewater. HOBAS GRP Pipe Systems are widely utilized for sewers as well as bridge, road or tunnel drainage. A particular danger in wastewater systems is biogenic sulfuric acid with a low pH-value, which attacks concrete and steel. Due to the GRP material's high corrosion resistance HOBAS Sewer Pipe Systems easily withstand such chemical attacks.

For particularly aggressive media, in e.g. industrial applications, HOBAS GRP Sewer Pipes are equipped with high performance resins or special liner material.