Removal and Replacement of AHU Drain and Sewerage Line from 9th Floor to Basement at PSO House Karachi

Pakistan State Oil Company Limited (PSO) invites quotations for the removal and replacement of the blocked AHU drain and sewerage line extending from the 9th floor to the basement at PSO House, Karachi. This procurement covers comprehensive civil and plumbing works including demolition, installation, and finishing to restore proper drainage and sewerage functionality. Items being procured: - UPVC Pipe 4 inch Sch 80 (450 meters) - UPVC Elbow 4 inch (90 degree) (20 units) - UPVC Socket 4 inch (20 units) - UPVC Plug Tee 4 inch (20 units) - UPVC P Trap 4 inch (20 units) - UPVC Elbow 4 inch (45 degree) (20 units) - UPVC Y Tee 4 inch (15 units) - UPVC Y 4 inch (15 units) - UPVC Pipe 3 inch Sch 80 (120 meters) - Demolition and installation of UPVC pipe including demolition work (job) - UPVC Jointing Solution 473ml (25 units) - Joint Cleaner (8 units) The scope includes demolition of masonry walls to access the existing cast iron drain pipeline, safe dismantling and removal of old pipelines, core cutting of RCC slabs with structural safety verification, supply and installation of new Hydroplast UPVC pipelines with all fittings and supports, reconstruction of masonry walls with plaster and tiles, debris removal and site cleaning, and testing for leak-free operation. All materials must be new and genuine with specified pressure ratings. The contractor must ensure protection of existing utilities and structures, obtain necessary permits, and observe safety protocols including PPE usage. Eligibility requires relevant experience in similar civil and plumbing works. Earnest money and bid security details are as per PSO instructions. The entire job must be completed within the agreed timeframe to the satisfaction of the PSO Engineer-in-Charge. Bidders should submit sealed quotations by **23 November 2026**. The submission address is the procurement office at PSO House, Khayaban-e-Iqbal, Clifton, Karachi. Coordination with PSO representatives is essential for shutdowns and reconnections. A practical tip for bidders: ensure thorough site visits and structural assessments before quoting, as core cutting and masonry reconstruction require precise technical approval and safety verification to avoid delays or penalties.