Overhead vs Underground Tank Cleaning
Raj Babbar · 9 min read
Home › Water Tank Cleaning › Underground Sump Cleaning › IP Extension
IP Extension packs one of Delhi's densest concentrations of CGHS group housing, and under each society block sits a large underground sump feeding the flats above. KaamGenie cleans these bulk buried reservoirs with proper pump-out and disinfection, from ₹1,499.
Off the Patparganj and Hasanpur roads, this is cooperative-society heartland, hundreds of multi-storey blocks with barely a standalone house between them. The plumbing pattern is textbook society: a big underground sump takes the day's DJB supply, and booster pumps carry it up to the rooftop overhead tanks that serve dozens of flats per block. These are high-capacity buried tanks that a two-person rinse cannot handle, they need a crew, sized pumps and a proper de-sludge. Most run on quarterly or half-yearly cycles, and skipping one shows in the sediment load next time.
We ventilate and air-test the sump, pump out the standing water, scoop and wet-vacuum the settled silt, then jet-wash and sanitise to a hygienic finish before refill. RWAs wanting the rooftop banks done alongside can add our water tank cleaning in IP Extension. This page is specifically the buried society reservoir that feeds them.
A single society sump here can hold several thousand litres and pass the water of dozens of families every day, so the silt bed rebuilds fast and thick. All the sand and grit in the incoming DJB line drops out in the sump before the pumps lift cleaner water to the roof. At this volume the sludge is heavy enough that hand-bailing alone will not clear it, which is why we bring wet-vacuums and sized pumps.
Being large and buried in the block's pump room, these reservoirs slip off the maintenance list between AMC visits, and the shared responsibility means nobody chases a clean until the water turns. Standing water over a deep sludge bed grows biofilm that reaches the taps of every flat above. A scheduled quarterly drain, scrub and disinfect keeps a block this size safe.
No travel charge anywhere in IP Extension. 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 IP Extension — and there’s no travel charge to any of them:
Every locality in Delhi stores different water, and that decides how fast a tank fouls. This is IP Extension’s profile from The Delhi Water Index, built from our field observations across 250+ localities.
Indicative field characterisation, not a certified lab test. BIS IS 10500: TDS 500 mg/L acceptable, 2,000 permissible. Check any Delhi area →
“Our society block has one big sump for the whole tower. Can you clean a tank that size?” Yes, that is standard work for us in IP Extension. We bring a crew with high-capacity pumps and wet-vacuums matched to a multi-thousand-litre society reservoir, and manage the whole drain, de-sludge and disinfect in one visit.
“Can the society put its sump on an AMC schedule?” We can. Many IP Extension RWAs keep the block on a quarterly or half-yearly AMC so the sump is done on a fixed cadence with records for the society file. It also earns a better per-visit rate than one-off calls.
“What does a large society sump clean cost here?” It starts at ₹1,499 for small tanks and is priced by capacity. Big society reservoirs are quoted after we confirm the litres and access, with a bulk rate when several blocks are cleaned in the same run.
“How do you keep dozens of flats supplied during the clean?” We schedule the drain around the block's pump timing so the rooftop overhead tanks carry the flats through, then refill the sump once sanitised. For a large society we agree a slot with the RWA a day ahead.
“Will you give the RWA paperwork for the society records?” Yes. We provide dated before and after photos and a short cleaning note the RWA can file, plus any structural issues found in the sump, which most IP Extension societies want for their AMC record.
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 IP Extension 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 6-step 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.