Renewal of the external wastewater mains at Preußischer Hof

Summary

The contract covers renewal of the external wastewater mains at the Preußischer Hof property in Liebenwalde, serving the Louise buildings and reception building. The works include excavation and trench backfilling, installation of DN 100–200 wastewater pipes and manholes, and trenchless rehabilitation of an existing DN 200 clay pipe using a resin-impregnated liner. The liner works amount to approximately 375 metres. The contract also includes cleaning, opening branch connections, leak testing, CCTV inspection, surveying, preparation of records, commissioning, and a general inspection and overhaul of the grease separator. The bidder must submit a priced bill of quantities and the required tender forms. Price is the sole award criterion. The bidder must be an approved specialist company for wastewater installation work and include evidence of the RAL Gütezeichen Kanalbau, Group AK3, and registration in the installers’ register. The tender document gives the submission deadline as 21 October 2026 at 10:00.