Water Tank Disinfection Explained
Raj Babbar · 10 min read
Home › Water Tank Cleaning › South Delhi › Mujeeb Bagh
Mujeeb Bagh — the compact colony beside Abul Fazal Enclave toward the Yamuna khadar, living entirely on iron-rich borewell water that films its tanks orange and jams their float valves. We scrub the film out and get the valves moving, from ₹699.
Mujeeb Bagh sits close enough to the khadar that its borewells pull water with a heavy iron signature — the kind that leaves an orange film on buckets within a week and inside plastic tanks within a month. The colony mixes settled family homes with newer rental floors, and both run the same way: groundwater straight to the roof tank, RO cans for drinking. The iron doesn’t just stain; it gums float valves until they stick open, which is why overflowing tanks are a familiar sound in these lanes.
Summer adds the second problem: iron-rich water feeding sun-warmed tanks is a happy environment for algae, and tanks with stuck valves that constantly overflow keep their lids damp and their walls green. The combination — orange film below the waterline, green bloom above it — is Mujeeb Bagh’s signature tank interior. Both scrub out completely, but neither stays away without the float valve working and the lid sealing, so we treat those as part of the job.
For a standard 1000-litre overhead tank, the whole job takes about 90 minutes from doorbell to pack-up. Underground sumps take longer — usually 2 to 2.5 hours depending on sludge. You don’t need to provide anything: we bring our own water for the rinse, vacuums, jet pumps, food-grade disinfectant and gloves, and send before/after photos on WhatsApp.
Iron film is different from scale — softer, faster-forming, and it tints every litre that touches it. Our Mujeeb Bagh cleans are built around removing it: full drain, high-pressure jetting, then manual scrub work over every stained surface, because jets alone burnish iron film rather than lifting it. The base sludge — usually a rust-orange paste here — is bagged and removed, the tank disinfected with food-grade chemicals, and the ₹699 price (up to 500L) doesn’t change for the extra scrubbing.
A float valve gummed with iron deposits stops closing, the tank overflows every pumping cycle, and the wet, warm conditions grow algae through summer — one fault cascading into three. Every Mujeeb Bagh clean includes a float-valve function check: we free and flush valves that are merely gummed, and flag the seized ones for a cheap replacement. Algae comes off the walls in the same scrub cycle, and a properly seating lid afterwards keeps the sunlight out that algae needs.
“Our tank in Mujeeb Bagh overflows every time the pump runs — can you fix that during the clean?” Usually, yes. Nine times out of ten it’s the float valve gummed with iron deposits, and we free and flush it as part of the clean. If the valve is seized beyond saving we’ll tell you the size to buy — it’s a ₹150–300 part your plumber fits in minutes.
“Will the orange colour in our water go away after cleaning?” The colour your tank adds will — removing the iron film and rust-paste sludge makes an immediate visible difference. The borewell itself still carries iron, so the film returns over months, which is why we suggest a six-monthly cycle in this colony.
“Is algae in the tank dangerous, and do you treat it or just scrub it?” Algae itself is mostly a taste-and-odour problem, but it signals sunlight and stagnation that also welcome bacteria. We scrub it off completely, disinfect with food-grade chemicals, and fix the conditions — a sealing lid and a working float valve — so it doesn’t return by August.
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Rooftop plastic tanks
₹699+ →Kothi sumps & underground tanks
₹1,499+ →Apartments & RWAs
Bulk pricing →FSSAI-compliant cleaning
₹2,500+ →टंकी साफ़ करने वाले
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