Water tank cleaning cost in Pakistan (2026) and how often to do it

Karachi 2026, typical: water tank cleaning is PKR 2,000 - 6,000 and takes 2 to 3 hours for a normal household tank. The range covers a small rooftop tank at the bottom and a large underground tank that needs pumping out and a person inside at the top. Quotes are usually per tank; if you have both an underground and an overhead tank, ask for both on one visit.

• Draining the tank and pumping out the last silt, not just running the tap dry
• Scrubbing the walls, floor and corners, and the float valve
• A disinfectant wash, rinsed until the water runs clear
• Checking the lid, the overflow and the inlet screen, since an open lid is how the dirt gets in
• Refilling and running each tap until clear

A common rule is every six months for a household tank, and sooner if the lid does not seal, the area is dusty, or the supply is tanker water. Do it before the summer when consumption is highest, and again after the monsoon.

• Smell or a yellow tint in the water
• Silt in the glass or at the bottom of the kettle
• Green film on the tank walls or the float
• Repeated stomach complaints in the house
• A year or more since the last clean

Both do it. A plumber is the better call if the float valve, the inlet or the motor line also needs attention; a cleaning service is fine for a straight scrub and disinfect. On Mechanics4U either trade replies when you post the job; say which tank, its size in gallons if you know it, and whether it is overhead or underground.

Post the job with a photo of the tank and its lid, the number of tanks, and the day and hours you want. Registered kaarigars in your city send a price. Agree it before anyone climbs the roof; if the same problem comes back within 48 hours, the kaarigar returns, labour free.