Sintex & Plastic Water Tank Cleaning in Delhi

What is sintex & plastic water tank cleaning?

Sintex and plastic tank cleaning is the full emptying, hand-scrubbing, vacuuming, disinfecting and rinsing of the moulded plastic tank on your roof — the black, white or triple-layer “Sintex-type” tank found on the vast majority of Delhi homes. Because the inner layer is food-grade and relatively soft, the whole job hinges on lifting biofilm and sediment without scratching that surface, which is exactly what a rough brush or a wire pad would do.

It is the right service for almost any Delhi household: DDA flats with a 500L flat tank, plot kothis with a 1000L standard tank, and small societies running 2000–5000L rooftop tanks. If your tank is the moulded plastic kind — not concrete, not steel — this is your service. Owners on borewell or tanker supply need it most, because plastic walls in the Delhi sun grow biofilm fast once sediment gives bacteria something to cling to.

Our sintex & plastic water tank cleaning process

Same thorough process for every job — no shortcuts.

1. Drain & inspect the layers — We pump out the standing water and check the inner wall for scratch marks, sun-crazing and old algae streaks. Leftover water goes to your garden or drain, your choice.
2. Soft food-grade scrub — Only soft brushes and pads on the moulded inner surface — never wire or abrasive pads that gouge the food-grade layer. This lifts biofilm and the greasy film plastic tends to hold.
3. Corner & inlet detailing — Sintex tanks have tight moulded corners and a recessed inlet where sludge hides. We work these by hand so nothing is left behind the baffle or around the outlet.
4. Wet-vacuum the slurry — An industrial wet vacuum pulls out the loosened sediment and dead biofilm. What remains in the tank at this point is only water.
5. Food-grade disinfection — Food-grade chlorine or hydrogen peroxide (your preference) with a 10-minute contact time to kill bacteria and algae spores clinging to the plastic.
6. Final rinse & photos — A clean rinse clears the disinfectant, then we refill from your supply and send before/after photos on WhatsApp. Water is safe to use once the mild chlorine smell clears in a few hours.

What sintex & plastic tank cleaning costs in Delhi

Sintex and plastic tanks are standard home tanks, so they use our fixed, published per-size pricing — the figure quoted on the call is what you pay, with no add-ons when the crew arrives.

Tank size	Price
Up to 500 Litres	₹699
501 – 1000 Litres	₹899
1001 – 1500 Litres	₹1,299
1501 – 2000 Litres	₹1,499
2001 – 3000 Litres	₹1,999
3001 – 5000 Litres	₹2,499
5001 – 10000 Litres	₹3,999
Above 10,000 Litres	Quoted per visit

Prices include GST for residential customers; commercial premises get a separate GST invoice. Call 95603 66362 for an exact quote.

Why plastic tanks foul faster in the Delhi sun

Heat drives biofilm. A black Sintex tank on an exposed Delhi roof can cross 40°C inside during summer. That warmth, plus even a thin sediment layer, is ideal for the slimy biofilm that makes water smell “off” long before it looks dirty.

Scratches become traps. Every scratch from a past rough-cleaning becomes a groove that holds sediment and shelters bacteria from disinfectant. This is why we insist on soft brushes only — the goal is to clean the surface without adding new grooves for next time.

Sunlight leak feeds algae. Cracked or ill-fitting lids — common on older white and translucent tanks — let light in, and algae needs nothing more to streak the walls green within weeks. We flag a failing lid and can fit a standard replacement on the spot.

Sintex vs other plastic tanks — does it change the clean?

“Sintex” has become the everyday name for any moulded plastic tank, but roofs carry several kinds: single-layer black tanks, opaque white tanks, and triple-layer tanks with a food-grade white inner, a middle insulating layer and a UV-stable outer. The cleaning steps are the same, but triple-layer tanks hold temperature better, so they grow biofilm a little slower than a bare single-layer black tank in full sun.

What never changes is the tooling: soft food-grade brushes, wet vacuum and food-grade disinfectant, never abrasives or harsh acids that damage the plastic. If your tank is concrete or RCC instead, that rougher surface needs a different approach — see our concrete & RCC tank cleaning. For the wider picture, the guide on plastic vs concrete tanks covers which cleans easier and why.

Common questions

“Will scrubbing scratch or damage my Sintex tank?” No. We use only soft food-grade brushes and pads on the moulded inner wall, never wire brushes or abrasive scourers. Scratches would trap sediment and shelter bacteria, so avoiding them is the whole point. Standard home tanks are cleaned under our fixed pricing from ₹699 — call 95603 66362 to book.

“How often should a plastic rooftop tank be cleaned in Delhi?” Every 6 months for DJB-supplied homes and every 4 months for borewell or tanker-fed homes, because plastic walls in the Delhi sun grow biofilm quickly once sediment settles. Annual cleaning is the bare minimum — below that the water starts to smell and taste off even when it looks clear.

“How much does Sintex tank cleaning cost?” It follows our fixed per-size pricing: from ₹699 for up to 500L, ₹899 for a 1000L standard tank, and up to ₹3,999 for a 5000–10,000L society tank. The price quoted on the call is final — no surprise additions when the crew reaches your roof.

“My tank water smells even though it looks clear — why?” That is almost always biofilm on the inner wall, not the water itself. A warm black plastic tank grows a slimy bacterial film you cannot see, and it is what you smell in the morning fill-up. A proper scrub-and-disinfect removes it, and most customers notice cleaner water within a day or two.

“Do you replace a broken or missing tank lid?” Yes. A cracked or missing lid lets in sunlight, dust and insects, so we carry standard replacement lids for 500L, 1000L and 2000L tanks. Replacement runs ₹500–700 depending on size and is added only if you want it. We will flag a failing lid during the clean.

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Ready to book?

Call +91 95603 66362, WhatsApp here, or use the booking button at the top. Same-day where possible across Delhi NCR.