Underground Sump Cleaning: Cost & Safety
Raj Babbar · 9 min read
Home › Water Tank Cleaning › Sintex / Plastic Tank Cleaning › Shanti Niketan
In Shanti Niketan, the plastic and Sintex loft tanks on large kothis and diplomatic homes often sit unopened while algae builds through their sunlit walls. We clean them gently and food-grade. From ₹699.
Shanti Niketan is an elite, low-rise colony of large kothis and diplomatic homes near Chanakyapuri and Vasant Vihar. Water usually comes off big individual overhead tanks and underground sumps, but almost every house also keeps Sintex or plastic tanks for lofts, terraces and staff areas. With small households and ample storage, these plastic tanks often hold water that sits for long stretches without being drawn down. Still, sunlit water inside a plastic tank is precisely the condition algae need to take hold.
Supply here is mostly DJB, and the fine silt it carries settles into a soft sludge on plastic floors between the infrequent cleans. If you want the large overhead tanks and underground sump cleaned as well, our broader water tank cleaning in Shanti Niketan page covers those. This page is specifically about Sintex and plastic tanks — the smaller overhead tanks that grow algae quietly on these big, calm rooftops.
In a large Shanti Niketan kothi a plastic loft tank may serve only a few people, so its water sits for days rather than turning over. Warmed by the sun through the plastic and lit by that daylight, the still water becomes ideal for algae, which need only light and time. A concrete tank stays dark inside and slows any bloom, but Sintex and plastic let the light straight through, so even a lightly used tank slowly turns green and coats its walls with a film.
Neglect completes the picture. These loft and terrace tanks are tucked away and rarely opened, so years of settled dust and hard-water scale build up undisturbed. The DJB silt forms a soft sludge on the plastic floor, while a scale ring hardens around the outlet. By the time a lid is finally lifted, there is usually a heavy biofilm and a stale smell that only a full drain, plastic-safe scrub and disinfection will clear from the tank.
No travel charge anywhere in Shanti Niketan. 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 Shanti Niketan — and there’s no travel charge to any of them:
“Do you clean Sintex tanks in Shanti Niketan near Vasant Vihar?” Yes. We cover all of Shanti Niketan and the surrounding stretch near Vasant Vihar, Anand Niketan and San Martin Marg. Many of the plastic loft tanks in these kothis have not been opened in a long time, so we allow extra time for the heavier build-up we usually find inside them.
“What does it cost to clean a 500 to 1000 litre Sintex tank here?” A plastic loft tank up to 500 litres starts at ₹699, and a 1000 litre Sintex tank is ₹899. The rate covers draining, clearing the sludge, a plastic-safe wash, hand-scrubbing and a food-grade sanitiser, with photos afterwards. A large kothi often has several plastic tanks, and we give a bulk discount when four or more are done together.
“Can you clean my plastic tank the same day I call?” Usually we can offer same-day or next-morning for Shanti Niketan. A single plastic tank takes about ninety minutes, though a long-neglected one with heavy algae may run over. We will be honest about timing on the call, and your supply returns to normal the same day once the tank refills.
“Why does my Sintex tank in Shanti Niketan go green even when barely used?” Even lightly used plastic tanks here turn green because the walls let sunlight in, and light on still, warm water is all algae need. In these big kothis a loft tank often serves few people, so the water sits and the film has time to spread. Rinsing never removes it; the walls must be scrubbed and disinfected.
“Is pressure washing safe for a plastic tank, and how do you remove algae without scratching it?” Very safe. We wash plastic and Sintex tanks at a pressure set for the material, so there is no cracking or gouging even on an older, sun-brittled tank. Algae is lifted with soft pads, never wire brushes, which scratch the plastic and speed up biofilm return. A food-grade disinfectant then kills the last spores before we refill.
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 Shanti Niketan 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.