Plastic vs Concrete Tank Cleaning
Raj Babbar · 8 min read
Home › Water Tank Cleaning › Overhead Tank Cleaning › Defence Colony
Defence Colony’s builder floors each keep an overhead tank on the shared roof — the last stop before that floor’s taps. KaamGenie cleans rooftop tanks across the A-to-D blocks, food-grade and documented. From ₹699.
Defence Colony is an upmarket A-to-D block layout of independent kothis and premium builder floors, threaded by the central nallah. Supply is mainly DJB with some private borewells, and older underground sumps under the parking pump water up to individual overhead tanks — typically one per builder floor on the shared terrace. That per-floor arrangement means each family relies on its own rooftop tank, and its condition depends entirely on when that particular floor last had it opened and cleaned.
KaamGenie cleans these individual rooftop tanks the proper way — drain, remove the sludge, jet-wash the scale, hand-scrub the corners and inlets, then a food-grade disinfectant wash before refilling, with dated before-and-after photos on WhatsApp. We can do a single floor’s tank or every tank on the terrace in one visit. This page is part of our water tank cleaning in Defence Colony service and focuses on the overhead (rooftop) tanks.
Running along the central nallah, Defence Colony has a persistent problem with insects and airborne grime around the water channel, and rooftop tanks with worn or ill-fitting lids let mosquitoes, dust and debris settle inside. The individual builder-floor tanks are compact and used hard by one family, so they cycle quickly and keep fine sediment moving into the taps. Between the nallah environment and heavy daily use, these rooftop tanks develop a film and a grit layer within a few months.
Because each floor owns its own tank, cleaning tends to be forgotten — the ground-floor and top-floor families rarely coordinate, so some tanks are done yearly while the one next to them has gone untouched for years. The old underground sumps feeding them can pass silt upward, and the summer borewell top-up adds hard-water scale. Cleaning all the terrace tanks together keeps every floor’s water even and removes the sump-borne sediment before it reaches the kitchen.
No travel charge anywhere in Defence Colony. The final price is confirmed on the call before we come — it depends only on tank size and access.
See it done in 45 seconds
Watch our web story on how a tank is really cleaned — drain, de-sludge, jet-wash, disinfect.
We reach every pocket of Defence Colony — and there’s no travel charge to any of them:
“Do you clean rooftop tanks on the builder floors in C Block, Defence Colony?” Yes. C Block is on our regular Defence Colony round, along with the A, B and D blocks. Since each builder floor here usually has its own rooftop tank, we can clean just your floor’s tank or every tank on the shared terrace in one visit. Let us know how many tanks are on the roof when you call and we will schedule to suit.
“What does overhead tank cleaning cost on a Defence Colony builder floor?” A single floor’s tank up to 500 litres is ₹699, and a standard 1,000-litre tank is ₹899. Larger 1,001 to 2,000-litre tanks are ₹1,299 to ₹1,499. When several floors have their separate rooftop tanks cleaned together on one visit, a bulk discount applies, so coordinating with your neighbours lowers the cost per tank.
“Can you clean my Defence Colony rooftop tank the same day?” Usually, yes. Call the KaamGenie team on 95603 66362 and, schedule permitting, we will send a crew to your Defence Colony block the same day. A single builder-floor tank takes about ninety minutes to two hours, so a morning booking is cleaned, disinfected and refilled by the same evening.
“Why does my Defence Colony rooftop tank get dirty so quickly?” The colony’s central nallah brings insects and airborne grime, and rooftop tanks with worn lids let them and terrace dust settle inside. Each compact builder-floor tank is used hard by one family, so grit keeps moving into the taps, and old sumps pass silt upward. Between the setting and the heavy use, these tanks build film and sediment within months.
“Is a Sintex rooftop tank cleaned differently from a concrete one in Defence Colony?” Yes. Sintex and plastic tanks let light through and grow algae faster, so we use softer jetting and pads to avoid cracking them. Older RCC concrete tanks hold heavier scale and take firmer high-pressure jetting. Defence Colony has both across its builder floors, and we check the tank on arrival and adjust the method to suit.
See our complete water tank cleaning services in Delhi NCR — pricing, process, tank types and full city coverage.
Beyond water tank cleaning, KaamGenie is rolling out a full lineup of home services across Delhi NCR — see our complete list of 12 home services we offer or will be launching through 2026. New to tank cleaning? Read our guide on how to pick the right water tank cleaning service in Delhi — what to look for, what to avoid, and the questions that separate trustworthy crews from quick-job operators.
Rooftop plastic tanks
₹699+ →Kothi sumps & underground tanks
₹1,499+ →Apartments & RWAs
Bulk pricing →FSSAI-compliant cleaning
₹2,500+ →टंकी साफ़ करने वाले
हिन्दी पढ़ें →View all water tank cleaning guides →
All pockets and lanes of Defence Colony covered. If your specific block or society isn’t named in the sub-areas above, just call — we almost certainly cover it.
Same crew, same food-grade process, same-day where possible. Pick any locality below for local pricing and the tanks we typically find there.
Book a slot — we can usually fit you in today or tomorrow.