What is Overhead Tank Disinfection?
Overhead tank disinfection is the professional process of draining, scrubbing, chemically treating and resealing your rooftop water storage tank. It goes far beyond rinsing — targeting the bacteria, algae, biofilm, sediment and insect residue that accumulate over months of use and cannot be removed by simply running the tap.
In Abuja, most households rely on overhead tanks as their primary water supply. Without regular professional disinfection, these tanks become silent sources of waterborne illness — contaminating every tap, shower and kitchen in the building without any visible warning sign.
The World Health Organisation recommends overhead water storage tanks be professionally cleaned and disinfected at least twice per year. For households with children, elderly members or anyone with a weakened immune system, quarterly disinfection is advised.
What Our Disinfection Service Includes
Full emptying of the tank before any cleaning begins — no shortcuts.
Removal of all loose sediment, scale, and residue from walls and floor.
Full pressure wash of all interior surfaces with food-grade cleaning agents.
WHO-approved chlorine solution applied to eliminate bacteria, viruses, and algae.
Complete rinse to remove all chemical agents before the tank is refilled.
Checking for cracks, loose fittings, and ensuring the cover is properly sealed against insects and dust.
Completion certificate issued after every job — valid for property management and health inspections.
Tank confirmed sealed and ready before our team leaves the premises.
Our 6-Step Process
Full Drainage
The tank is completely emptied before any cleaning begins. Partial drainage leaves contaminated water in contact with cleaned surfaces — we never cut corners.
Dry Scrubbing
All loose sediment, rust, scale, and residue is removed from the walls and floor before wet cleaning begins.
Wet Pressure Scrubbing
All interior surfaces are pressure washed and scrubbed with food-grade agents — walls, floor, inlet and outlet areas included.
Chlorine Disinfection
WHO-approved chlorine solution is applied at the correct concentration to eliminate all bacteria, viruses, algae and biofilm. Contact time is fully observed.
Rinse & Flush
The tank is thoroughly rinsed to remove all chemical agents before refilling. Water is safe for immediate use upon completion.
Inspection & Certificate
All fittings, the inlet filter, and the tank cover are inspected and resealed. A written service certificate is issued before our team leaves.