OVERHEAD TANK CLEANING · PLASTIC AND CONCRETE · ROOF AND TERRACE
Overhead water tank cleaning in Delhi NCR (chhat ki tanki ki safai).
Your roof tank drained, de-sludged, scrubbed, vacuumed and disinfected, with photos of the inside before and after.
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Continue on WhatsApp- 15+ years of experience
- Our own verified team
- Fixed price before we start
- No hidden charges
- Written warranty
- Free revisit
- CIB&RC-registered products
- Herbal option available
- Same-day service available*
- Photo report on WhatsApp
- Same team on repeat visits
- No selling at your door
*Termite warranty depends on the chemical chosen and is written on your job card. Same-day service depends on slot availability.
Quick answer
AHC cleans plastic and concrete overhead tanks on roofs and terraces across Delhi NCR: ₹699 for a tank of up to 1,000 litres, ₹999 up to 2,000 litres and ₹1,499 up to 5,000 litres, including GST; 365-plan members get ₹149 off each extra tank in the same visit. One trained technician cleans a tank of up to 2,000 litres in about 60 to 90 minutes: drain, remove the sludge by hand, pressure-wash, scrub the walls, corners and lid, vacuum out the dirt, disinfect, rinse, and send you before-and-after photos on WhatsApp. Plastic tanks are scrubbed with soft brushes so the inside isn't scratched.Overhead tank cleaning prices
| Tank | Capacity | Price (incl. GST) |
|---|---|---|
| Overhead | Up to 1,000 L | ₹699 |
| Overhead | 1,001-2,000 L | ₹999 |
| Overhead | 2,001-5,000 L | ₹1,499 |
| Underground sump | Up to 1,500 L | ₹1,199 |
| Underground sump | 1,501-3,000 L | ₹1,499 |
| Underground sump | 3,001-5,000 L | ₹1,999 |
| Underground sump | 5,001-10,000 L | ₹2,799 |
| Underground sump | 10,001-15,000 L | ₹3,299 |
| Underground sump | 15,001-20,000 L | ₹3,799 |
| Underground sump | 20,001-30,000 L | ₹4,499 |
| Above 30,000 L | Society / commercial | Free visit, then fixed quote |
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365-plan members get ₹149 off each extra tank cleaned on the same visit.
| Tank capacity | Price incl. GST |
|---|---|
| Above 5,000 litres | Fixed quote after a free visit |
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365-plan members get ₹149 off each extra tank cleaned in the same visit. A roof tank and a sump together? The sump is priced from its own table. Source: AHC price book, 6 Oct 2026.
On a plan: Total 365 includes three tank cleans a year (up to 1,000 litres each). On Shield 365 or Care 365, the Tank Pack adds two overhead tank cleans a year for ₹1,099. 365 Plans →
How to find your tank's size
- Plastic tanks usually have the capacity printed on the side or the lid: 500, 750, 1,000, 1,500, 2,000 litres.
- Box-shaped concrete tanks: measure the inside length, width and depth in feet, multiply them, then multiply by 28.3. For example, 5 × 4 × 4 ft = 80 cubic feet ≈ 2,264 litres.
- Round tanks without a label: send us a photo with a person or a door next to it for scale, and we'll tell you.
Not sure? Send a photo on WhatsApp; we'll confirm the price before booking.
Plastic or concrete: how each is cleaned
| Plastic (Sintex-type) tanks | Concrete or brick tanks | |
|---|---|---|
| Common in | Flats, builder floors, newer kothis | Older kothis and buildings, built into the roof |
| What builds up | Algae and a slimy film, especially in black and green tanks in summer; silt on the floor | More sludge and scale; cracks and a crumbling lid edge to check |
| How we clean | Soft brushes and non-scratch pads, so the smooth inner layer isn't scratched | Stiffer brushes for scale; cracks noted in your photos |
| Access | Through the lid; a technician reaches inside or enters larger tanks | Through a manhole; usually entered |
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Plastic water tanks in India are made to a BIS standard (IS 12701) for rotational-moulded polyethylene tanks. A scratched inner surface gives algae and sludge more to grip, which is why we don't use wire brushes or harsh scrapers on plastic.
Source: BIS, IS 12701 (rotational moulded polyethylene water storage tanks), as listed by Public.Resource.Org.
Signs your roof tank needs cleaning
- Cloudy, yellow or smelly water, worst first thing in the morning
- Sediment at the bottom of a bucket after it stands
- Green algae or a slimy film when you open the lid (sun on a roof tank warms the water and speeds algae up)
- Silt after the monsoon, when the supply carries more mud
- Slimy tap aerators
- More than six months since the last clean, or nobody knows when it was
How often depends on your water: about every 6 months on Delhi Jal Board or municipal supply, every 3 to 6 months on borewell, and about every 3 months on tanker water. Water Tank Cleaning →
How we clean an overhead tank
Every overhead tank gets the same 9 steps as all AHC tank cleans: inspect, drain, remove sludge by hand, pressure-wash, hand-scrub walls, corners and lid, vacuum out the loosened dirt, disinfect, rinse, and send photos. For a tank of up to 2,000 litres, one trained technician takes about 60 to 90 minutes.
Roof access and safety
- We need access to the roof or terrace, including keys to a locked terrace door, and a safe way up: a fixed staircase or a secure ladder.
- On sloping or unfenced roofs, the technician goes up only where there is safe access; we'll tell you on the call.
- Tanks on raised stands or above the stair room need a ladder; tell us the height when you book.
- The lid is checked: a cracked or loose lid lets in dust, birds and mosquitoes, and we'll show you in the photos.
Before, after, not included
Before we arrive
- Store water for a few hours (buckets, a second tank)
- Switch off the motor so it doesn't run dry or pump into an empty tank
- Make sure the terrace is unlocked and the inlet and outlet valves can be reached
- Tell us your water source: Delhi Jal Board, borewell or tanker
After the clean
- Let the tank refill fully before use
- Run the taps for a short while before drinking water straight from the tap
- Keep the lid closed and put a mesh on the overflow pipe
- Book the next clean on the interval for your water source
Not included
- Tank repair, crack sealing or replacing the lid
- Plumbing, valves, the motor or the float switch
- Water testing in a lab
- Moving or replacing a tank
Your exact price
Pick your home size. Flip to Yearly plan to see the 365 price.
Step 1 · Your home
Step 2 · Services
Add-ons and anything under ₹549 are booked with another service; we confirm your booking on call or WhatsApp.
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Pick anything else for the same visit; the price on the right updates as you go.
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Overhead tank cleaning: your questions
How much does overhead tank cleaning cost?
Can you clean a 500 or 750-litre tank?
Will cleaning scratch my plastic tank?
Do I need to empty the tank before you come?
How long does it take?
Is the water safe to drink after cleaning?
Chhat ki tanki kitne din mein saaf karwani chahiye?
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