Karachi's water supply picks up sediment, algae, and bacteria long before it reaches your tap. Professional cleaning and disinfection is the only way to know your tank isn't the problem.
In Karachi's conditions — intermittent supply, aging pipes, and warm temperatures — tanks collect sediment, algae, and bacterial growth faster than most people realise. Filtration alone doesn't solve a dirty tank.
Stagnant water and warm storage conditions create ideal breeding grounds for E. coli, coliform bacteria, and other pathogens that cause gastroenteritis and typhoid.
Green algae forms on damp internal walls, especially in overhead plastic tanks exposed to sunlight. It affects taste, colour, and the safety of your water.
Rust particles, sand, and organic matter settle at the tank floor over time. This sludge harbours microorganisms and blocks float valves.
Water filters work downstream — they don't clean the tank itself. A contaminated tank continuously reintroduces bacteria into your filtered supply.
Commercial properties, restaurants, schools, and export facilities are often required to provide a valid water tank cleaning certificate for compliance purposes.
Health authorities recommend cleaning domestic tanks at least twice a year. Industrial and food-related facilities may require quarterly cleaning depending on usage.
Every tank — overhead or underground, small or industrial — goes through the same thorough process: chemical disinfection, high-pressure jet washing, physical scrubbing, clean rinse, and certificate. Here's exactly what we do.
We apply a prepared solution of chlorine (sodium hypochlorite) and potassium to all internal surfaces — walls, floor, corners, and joints. Chlorine is a WHO-recommended disinfectant used in municipal water treatment worldwide. At the concentrations we use for tank cleaning, it eliminates bacteria, viruses, algae, and biofilm effectively, then fully dissipates during the final rinse. There is no harmful residue left in the tank after the process is complete.
After the chemical dwell time, we use a high-pressure jet machine to blast all internal surfaces — walls, corners, and the floor. This is far more effective than manual brushing alone: the pressure dislodges stubborn algae staining, scale deposits, mineral buildup, and any loosened sediment that chemical treatment has broken down. The combination of chemical and pressure ensures nothing is left behind.
Where needed — particularly in corners and along the floor seams — our technician follows up with manual scrubbing brushes after the pressure wash. Loosened sludge and sediment are then cleared from the tank floor completely using wiper and mop before the final rinse begins.
The entire tank is flushed through with fresh clean water until all traces of the cleaning solution and dislodged debris are fully removed. The tank is left clean, dry at the base, and ready to refill immediately — with no chemical taste, odour, or residue.
On completion, we issue an official water tank cleaning certificate documenting the date, method, and chemicals used. Accepted for commercial compliance, lease renewals, health authority inspections, and export documentation.
We arrive fully equipped. You don't need to arrange anything beyond reducing the water level before our visit.
Please reduce the water level in your tank as low as possible before our team arrives. That's all you need to do — we handle everything else from there.
Yes — completely. Chlorine is the same disinfectant used by KWSB and water utilities to make tap water safe to drink. At cleaning concentrations it destroys pathogens on contact, and when the tank is properly rinsed at the end of the process, it leaves no residue, taste, or hazard behind.
The tank can be refilled and used as normal immediately after service. There is no need to ventilate your home, vacate the premises, or avoid the water for any period following a professional tank clean.
The access method differs, but the standard doesn't. Both tank types receive the same thorough three-stage treatment.
Overhead tanks — whether HDPE plastic, fibreglass, or concrete — are exposed to sunlight and temperature swings that accelerate algae growth on internal walls. These tanks are also the most directly connected to your household taps, making cleanliness critical.
Underground tanks accumulate sludge and sediment at a higher rate due to their position and the nature of ground-level water delivery. Entry and access require specialist equipment and proper safety procedure — something we're fully equipped to handle.
From a single rooftop tank in an apartment building to an industrial complex with multiple large-capacity underground tanks — we're equipped for all of it.
Residential overhead and underground cleaning. Quick scheduling, minimal disruption, certificate on request.
Multi-unit buildings with shared rooftop tanks. We coordinate access and document each tank cleaned.
Off-hours and weekend scheduling to avoid disruption. Compliance certificates for building audits.
Large-capacity industrial tank cleaning. Food-safe disinfectants where production processes require it.
Child-safe protocols. Thorough documentation for trust and parent assurance.
HACCP-aware methods. Health authority compliance certificates accepted across Karachi.
"Got water tank cleaning and general fumigation together. Fair price, proper certificate, and a team that actually cleans properly. Having a real office you can walk into if needed makes a huge difference."
"Our restaurant required a cleaning certificate for a health inspection. Unique Fumigation came the next day, did a thorough job, and issued the certificate on the spot. No hassle, completely professional."
"We manage an apartment block with a shared rooftop tank. The team coordinated perfectly, cleaned both tanks, and gave us documentation for all residents. We've booked them on a 6-month cycle since."
Fill the form for a callback, WhatsApp, or call directly. We confirm your booking within hours and arrive at a time that suits you.
Tell us about your tank and we'll confirm scheduling and pricing by phone.
Fill the form, call, or WhatsApp. Tell us your tank type, property, and area.
We call within hours to confirm pricing and book a time that works for you.
Before we arrive, simply reduce your tank's water level as low as possible.
Chemical treatment, physical scrubbing, floor cleaning, and final rinse.
Job complete. Certificate provided. Tank ready to refill immediately.
Book your tank cleaning today. Fast scheduling, honest pricing, and an official certificate on completion.