Large-capacity tanks (above 10,000 litres) are common in commercial buildings, apartments, hospitals, and institutions—but if left uncleaned, they can become breeding grounds for harmful bacteria, sludge, and algae. At Sajilo Sewa, we offer professional overhead tank cleaning services for tanks over 10,000 litres in Kathmandu, Bhaktapur, and Lalitpur using industrial-grade equipment and UV disinfection. Our expert team ensures thorough cleaning, safety, and water hygiene compliance for high-capacity water systems. 🧼 Service Includes: • Tank drainage and sludge suction • High-pressure jet cleaning of walls and base • Manual scrubbing (as needed) • Anti-bacterial treatment • UV disinfection and final rinse • Post-cleaning hygiene inspection and report ✅ Ideal for: Apartment complexes, commercial buildings, schools, offices, and hospitals ✅ 30-day service warranty on all cleaning work ❓ Frequently Asked Questions (FAQ) Q1: How long does it take to clean a 10,000+ litre tank? A: It usually takes 3–6 hours, depending on tank size, condition, and accessibility. Q2: Can the tank be used immediately after cleaning? A: Yes, after UV treatment and final rinse, the tank is ready for use. Q3: Is this safe for drinking water storage tanks? A: Absolutely. We use food-safe methods and chemical-free UV treatment. Q4: Do you issue any post-cleaning report? A: Yes, upon request, we can provide a basic hygiene report and cleaning checklist. Q5: Do you clean underground or sump tanks too? A: Yes, we provide both overhead and underground tank cleaning for all capacities. 👉 Book now for large tank cleaning in Kathmandu and ensure safe, hygienic water storage for your building or business!