Rooftop Water Tank Cleaning Service in Kathmandu
Baudha Water Tank Cleaning Services clears out the sediment, algae, and stagnant residue that collect inside rooftop water tanks across Kathmandu. Most tanks in the valley go six months to a year without being opened, and by the time anyone checks, a layer of grit has usually settled at the bottom and mixed back into the water every time the pump kicks on. We drain, scrub, disinfect, and refill the tank on the same visit, working around your household’s water schedule so you’re never left without supply for more than a few hours.
Why Kathmandu rooftop tanks need cleaning more often than people expect
Kathmandu’s water supply comes from a mix of municipal lines, private borewells, and tanker trucks, and almost none of it arrives with the tank already clean. Tanker water in particular carries fine silt that settles at the bottom within days, and every monsoon, the same tank can grow a visible film of algae along the waterline wherever sunlight reaches through a loose lid or an unsealed vent. Left alone, this buildup isn’t just unpleasant to look at — it’s where mosquito larvae breed, which matters in a city already dealing with seasonal dengue outbreaks, and it’s the sediment your family is drinking, cooking, and bathing in every time the tap runs.
What's included in a rooftop tank cleaning visit
A typical visit takes about 60 to 90 minutes for a standard 1,000 to 2,500 litre rooftop tank, longer for larger apartment or hostel tanks. Our technicians drain the tank fully, scrub the interior walls and base by hand to lift caked sediment and algae, rinse until the runoff runs clear, and finish with a food-grade disinfection rinse before refilling. While the tank is open, we also check the lid seal, overflow pipe, and inlet valve, since a cracked lid is usually the reason a tank got dirty in the first place.
Why households in Kathmandu choose us over a general plumber
A plumber can fix a leak; cleaning a tank properly is a different job that involves climbing inside a cramped space and actually finishing the scrub instead of hosing it down from the top. Baudha Water Tank Cleaning Services technicians specialize in rooftop and underground tank cleaning specifically, so the job gets done the same thorough way on every visit, and we photograph the tank before and after so you can see the difference rather than take our word for it.
Pricing and service packages
Cost depends mainly on tank size and access — a rooftop tank with easy ladder access costs less than one built into a tight parapet space or shared across multiple flats. We offer one-time cleanings as well as a twice-yearly maintenance plan, which works out cheaper per visit and means the tank gets checked on a schedule instead of only after someone notices a problem. Send us your tank’s size and location in Kathmandu and we’ll quote before booking — there’s no inspection fee.
Frequently Asked Questions
How often should a rooftop tank be cleaned in Kathmandu?
Twice a year covers most households — once before monsoon to clear out whatever settled over winter, and once after monsoon to remove algae growth. Tanks fed mostly by tanker water often need a third check mid-year, since tanker water tends to carry more sediment than piped supply.
Do you clean underground tanks too, or only rooftop?
We also clean underground reservoirs and overhead tanks in apartment buildings — mention your tank type when you book so we bring the right equipment.
Is the water safe to use right after cleaning?
Yes. We disinfect with a food-grade solution rated for drinking-water tanks, let it sit for the recommended contact time, then refill and flush the first draw from each tap before you use it normally.
How do I know if my tank actually needs cleaning?
A sharp chlorine-tanker smell, a greenish tint at the waterline, or grit settling in your bottom-most glass of water are the three signs we hear about most. If it’s been over six months since the last clean, it’s worth booking regardless of whether you’ve noticed anything yet.
If your rooftop tank hasn’t been opened this year, book a cleaning with Baudha Water Tank Cleaning Services and we’ll have it drained, scrubbed, and refilled the same day — serving Baudha and the wider Kathmandu Valley.