Water tank cleaning in Karachi
Jet washing, full sludge extraction and food-grade disinfection for overhead, underground RCC and fiber tanks. We inspect free, quote in writing, and the price does not move afterwards.
- 3,000+ PSI jet washing — not buckets and brushes
- Sludge vacuumed out, never flushed into your pipes
- Confined-space entry with ventilation, gas testing and harnesses
- Numbered tax invoice for buildings, schools and factories
Registrations
Certified, registered, and accountable on paper
Anyone can claim to be professional. These are the documents you can ask us to produce before you let a crew into your building — and you should ask any company you hire.
Quality management. Every job follows the same documented procedure, and each one is signed off.
Occupational health and safety. This is what covers our crews when they enter a sealed underground tank.
Sindh Revenue Board. Service tax is charged and deposited properly, so your building can claim input tax.
Federal Board of Revenue. You get a numbered invoice that survives an audit.
Why Karachi is different
Why tanks here need cleaning more often than the manual says
Most tank manufacturers suggest an annual clean. That guidance assumes a continuous, pressurised supply and moderate temperatures. Karachi has neither. Supply arrives on a schedule, sits in an underground tank, gets pumped to an overhead tank, and sits again — often at 35 °C or more. Water that is stored warm and stored twice gives sediment time to settle and gives biofilm a surface to grow on.
Biofilm is the part people miss. It is a thin, slippery layer of bacteria bonded to the tank wall, and it does not come off with a brush and a bucket of bleach. Chlorine poured into a tank with an established biofilm will kill what is floating in the water and leave the layer on the wall intact, which is why a tank can be “cleaned” in the morning and taste wrong again in a week. Removing it takes mechanical force — pressurised water at the wall — followed by a disinfectant that stays in contact long enough to work.
The second thing people miss is that the sludge has to leave the building. A common shortcut is to open the outlet and push the loosened sediment down the supply line. It clears the tank and quietly moves the problem into your pipes, your pump, your geyser and your filters. We vacuum it out.
The usual approach
- Brush, bucket, and a rinse
- Household bleach, dosed by eye
- Sludge flushed down the outlet pipe
- Biofilm left bonded to the wall
- No ventilation before entering a sealed tank
- No harness, no attendant at the hatch
- Cash, no invoice, no record of the visit
- No one to call if something goes wrong afterwards
How we do it
- Jet washing at 3,000+ PSI against the wall
- Silver-stabilised hydrogen peroxide, dosed to tank volume
- Sludge vacuumed into a container and removed
- Surfaces stripped mechanically before disinfecting
- Forced ventilation and gas testing before entry
- Harness, tripod and a standby attendant on every RCC job
- SRB and FBR invoice with a job number
- Two branches, both reachable 24 hours
The job, step by step
What actually happens when we arrive
Every tank goes through the same eight stages. Ask us at any point to show you what stage we are on.
Inspection and quote
We look inside the tank, measure it, check the hatch and the access route, and give you the price in writing. No obligation, and nothing is added later.
Controlled drainage
The tank is drained to a safe point. Contaminated water is never pushed back into your supply line.
Ventilation and gas check
On underground and sealed tanks, forced ventilation runs and the atmosphere is tested before anyone goes in. Harness and attendant in place.
Jet washing
Walls, floor and ceiling are cut with high-pressure water to break the biofilm and lift scale. Pressure is reduced for fiber and Syntex surfaces so they are not scored.
Vacuum extraction
All loosened sludge and sediment is vacuumed out and removed from the property.
Disinfection
Silver-stabilised hydrogen peroxide is applied at the correct concentration for the tank’s volume and left for its full contact time.
Rinse and refill
The tank is rinsed until clear, then handed back ready to refill. No taste, no smell, no residue.
Report and invoice
You get a dated service report, the photos we took, and a numbered SRB/FBR invoice. Keep it — it is your record of when the tank was last done.
Pricing
What it costs
You do not have to call to find out. Our calculator gives you a real figure for your tank in about thirty seconds, and the quote it gives you is the price you pay.
Price your tank in about thirty seconds
Choose your property type, say whether the tank is underground, overhead or both, and pick the size in gallons or square yards. You get the figure immediately — standard residential jobs need no site visit at all.
- Residential houses, portions and flats priced instantly
- Underground RCC, overhead, or both together
- Sized by gallons or by house square yards
- Commercial and industrial sites get a free survey first
- The quote is the final price — nothing is added on the day
Tank types
Tanks we clean
Different materials need different handling. Concrete takes full pressure; fiberglass does not.
Underground RCC tanks
The hardest and most dangerous tank to do properly, and the one most often skipped.
- Forced ventilation and gas testing before entry
- Harness, tripod and standby attendant
- Full sludge extraction, not flushing
- Wall and joint condition noted in the report
Overhead tanks
Roof and tower tanks, including the ones with awkward ladder access.
- Proper access equipment and fall protection
- Sun-warmed tanks get extra disinfectant contact time
- Lid and seal checked — most contamination enters here
Fiberglass, Syntex and Bestank
Smooth surfaces that scratch easily. A scored wall holds biofilm far better than an intact one.
- Reduced jet pressure
- Non-abrasive pads only
- All fiber and moulded plastic brands
Apartment buildings
Shared underground and overhead tanks, usually on a six-monthly cycle for the whole block.
- Scheduled around the building’s supply timing
- One invoice for the society or management
- Report the committee can circulate to residents
Hotels, hospitals and schools
Where a water incident becomes a regulatory problem, not just an inconvenience.
- Documented procedure and dated service records
- Product safety data sheets provided
- Work scheduled out of hours where needed
Factories and warehouses
Large-capacity and multi-tank sites, including process and storage tanks.
- Site survey and shutdown planning
- Crews sized to the tank, not the other way round
- Compliance report for your audit file
Coverage
Two branches, whole city
Call the nearer one and the crew reaches you faster. Either branch can take any job in Karachi.
DHA Phase 2 branch
South & West Karachi
Office-6, Plot-6-C, Phase 2, Defence Housing AuthorityKarachi, 75400 0333 0293174
Open 24 hours, every day
Closest to: DHA Phases 1–8, Clifton, Defence View, Gizri, Seaview, Korangi, Saddar, Malir, Landhi
Gulshan-e-Iqbal branch
East & Central Karachi
Suite-203, Mumtaz Manzil, Block 16, Gulshan-e-IqbalKarachi, 75300 0340 2717530
Open 24 hours, every day
Closest to: Gulshan-e-Iqbal, Gulistan-e-Johar, Nazimabad, North Nazimabad, Federal B Area, Liaquatabad, New Karachi, North Karachi, SITE, PECHS, Bahria Town
Questions
Before you book
How much does water tank cleaning cost in Karachi?
How often should a water tank be cleaned in Karachi?
How long does the job take and will my water be cut off?
What chemical do you use, and is it safe for drinking water?
Can you clean an underground RCC tank safely?
Do you give a proper invoice?
Which areas of Karachi do you cover?
Do you clean fiberglass and Syntex tanks?
Get the tank looked at this week
The inspection is free and takes twenty minutes. You will get a written price and photographs of what is actually inside your tank — whether or not you book us.