This tender invites eligible constructors to undertake the maintenance and upgradation of water filtration units at CATI, Hyderabad. Issued by the Pakistan Airports Authority (PAA), this project falls under the Construction & Civil Works Materials category and is based in Hyderabad, Sindh. The scope involves technical refurbishment and enhancement of existing water filtration infrastructure to ensure improved water quality and operational efficiency at the airport facility. The work requires licensed constructors registered with PEC in Category C-6 or above, possessing valid NTN. The site at Hyderabad demands careful handling of filtration units, requiring expertise in civil and mechanical maintenance. Contractors must be prepared to address engineering challenges related to water treatment systems, ensuring compliance with safety and quality standards. Bidders should ensure their PEC registration and FBR ATL status are current for the 2025-26 financial year. The tender follows the Public Procurement Rules 2004 and e-Pak Procurement Regulations 2023, mandating submission of earnest money via pay order or bank draft. Conditional bids are not accepted, and bid security must be original and valid to avoid disqualification. Submission deadline is on the 26th of January 2026 at 11:30 AM, with bid opening at the same time. Bids must be submitted electronically through the PPRA E-PADS portal. The physical submission of the original bid security instrument is required at the time of bid opening. The office address for queries is the Divisional Engineer ES (Civil), CATI Division, Hyderabad Airport. Pro-Tip: Make sure to attach the original bid security instrument on the opening date and time, as failure to do so will lead to outright rejection. Also, verify the authenticity of financial instruments to avoid blacklisting and legal consequences.