Overhead Water Tank Cleaning

Details

Rs 899 cleans one overhead tank up to 1,000 litres. Each further 1,000 litres is Rs 400. The method, in order, because a tank clean is exactly as good as its sequence: the tank is isolated and drained; the sludge is removed by hand rather than stirred back into the water; walls, floor and the underside of the lid are brushed; the whole interior is high-pressure rinsed; the residue is vacuumed out rather than washed down into your own down-pipe; and then it is disinfected. The disinfectant is named because a tank clean that skips it or waters it down is the standard version of this job. We use sodium hypochlorite dosed to leave about 50 mg per litre of free chlorine, held for a 30 minute contact time, then drained and rinsed until the free chlorine at your tap reads under 1 milligram per litre, which is the acceptable limit under IS 10500. The reading is taken in front of you and written on the card, along with before and after photographs of the tank interior and the lid, so the job is a thing you can see rather than a thing you were told about. Two honest limits. A cleaned tank is not potable water. We clean and disinfect the tank; what arrives in it afterwards is the supply's business, and the only way to know what is in your water is a laboratory test against IS 10500, which we can arrange at Rs 900 as an optional extra rather than implying it was included. And a tank clean costs water: draining and rinsing 1,000 litres takes roughly another 1,000 litres. If your supply is off that day, do not book it, and we will say that when you call rather than arrive and improvise.

• Rs 899 up to 1,000 litres, Rs 400 per further 1,000 litres
• Isolated, drained, sludge lifted out by hand, walls floor and lid brushed, high-pressure rinsed, residue vacuumed out rather than flushed into your own line
• Sodium hypochlorite to about 50 mg per litre free chlorine, 30 minute contact time, then rinsed until the tap reads under 1 mg/l, the IS 10500 acceptable limit
• Free chlorine reading taken in front of you and written on your card, with before and after photographs of the interior and the lid
• A cleaned tank is not potable water. An IS 10500 laboratory test is Rs 900 and optional, and we will not imply it was included
• Draining and rinsing a 1,000 litre tank uses about another 1,000 litres. If your supply is off that day, do not book it
• Not included: repairing or replacing the tank, lid or float valve, a structurally cracked tank, plumbing work, and the down-pipes and household lines
• The Gaya roster is being built, so this page names a service area and no arrival time. There is no crew size printed here, no response-time promise and no arrival window, because we would be inventing all three.