Underground Sump Cleaning: Cost & Safety
Raj Babbar · 9 min read
Home › Water Tank Cleaning › Overhead Tank Cleaning › Dwarka Sector 22
Overhead (rooftop) tank cleaning for the CGHS towers and DDA flats of Dwarka Sector 22, a dense residential pocket. From ₹699.
Sector 22 is one of Dwarka’s densest residential sectors, built up largely with cooperative group housing society towers and some DDA housing. Nearly every building here stores its water in a rooftop overhead tank fed from an underground sump, and that overhead tank is the final stop before the tap — no filter comes after it. With so many families drawing at once, sediment gets stirred and pushed toward the outlet all day. Hard DDA-borewell water plus rooftop dust means chalky scale and gritty sludge settle fast at the tank floor.
The piped supply is the familiar Dwarka 50-50 of Sonia Vihar DJB water and DDA borewells, consistently hard and mineral-rich, which is why a Sector 22 rooftop tank cakes up within a season. Heavy occupancy only speeds the buildup, so an annual clean matters more here than in a quieter block. We service the whole spread of society and DDA tanks, and this page sits alongside our full water tank cleaning in Dwarka Sector 22 offering. Every visit ends with before and after photos and a dated certificate for the RWA.
In a high-density sector like 22, the shared rooftop tanks refill several times a day, and each fill carries a fresh dose of hard borewell water. The dissolved minerals settle as chalky scale on the walls, while the constant draw keeps stirring old sludge back into the water. Rooftop dust adds a gritty layer that no household filter downstream can catch, because the tank is the last stop. Over a year that combination clouds the water and can carry a metallic taste to every flat on the line.
For dense society tanks we drain the overhead unit, scoop out the sludge, then jet wash the walls at high pressure to break the bonded scale a hose could never shift. A hand-scrub cleans the corners and outlet, and a food-grade disinfectant rinse finishes the inside with no chemical smell. We photograph before and after and hand over a dated certificate the managing committee can keep on file. In Sector 22 we usually suggest cleaning every six months given the heavy occupancy.
No travel charge anywhere in Dwarka Sector 22. 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 Dwarka Sector 22 — and there’s no travel charge to any of them:
“What is the difference in cleaning a DDA block terrace tank versus a society overhead tank in Sector 22?” A DDA block usually has a single rooftop Sintex tank that we can clean from ₹699, while a CGHS society tower runs a larger overhead tank paired with an underground sump. The society job needs more draining time and heavier jet-wash gear, so it is quoted by capacity. Both get the same drain, scoop, scrub, disinfect and certificate steps. We can handle a whole society’s tanks in one scheduled visit.
“How often should a densely occupied Sector 22 tower clean its rooftop tank?” Because Sector 22 towers refill many times a day with hard borewell water, we recommend cleaning the overhead tank every six months rather than yearly. High occupancy keeps stirring sludge back into the water, so the base cakes up faster than in a low-rise block. Twice-a-year cleaning keeps the water clear for every flat. We can set a standing schedule for the RWA.
“Do you clean both the overhead tank and the underground sump together?” Yes, for CGHS towers in Sector 22 we clean the underground sump and the rooftop overhead tank in the same visit so the whole line is covered. The sump collects the heaviest grit and the overhead tank collects the finer scale, so cleaning only one leaves the other feeding it. We drain, desludge, jet wash and disinfect both. You get photos of each and a single dated certificate.
“Is the disinfectant you use safe for drinking water?” We use a food-grade disinfectant approved for potable water tanks, so the water is safe to drink once the tank refills. It leaves no chemical smell or aftertaste, which matters when families across a Sector 22 tower draw from the same tank. We rinse thoroughly after applying it. The dated certificate records the product used for your RWA files.
“Can you work around our society’s water-supply timings in the Sector 22 CGHS pocket?” Yes, we plan the clean around your fill cycle in the Sector 22 CGHS pocket so residents lose as little supply as possible. We usually start when the tank is near empty to cut water waste and finish before the next scheduled fill. The crew coordinates with your pump operator on the day. Most single overhead tanks are done within a couple of hours.
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 Dwarka Sector 22 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.