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How to Keep Rainwater Tanks Clean

Start by switching off the valve located on top of the tank. Normally, the tanks used for harvesting rain water are usually devoid of this valve. So, in case you are using such tanks, you may skip this step.

Next, open the outlet meant for draining the tank. Drain away the water by connecting the draining point with a hose pipe. This directs the water flow in a particular direction and to a predetermined destination, avoiding any sort of damage or wastage. This is a time consuming process, especially if the plastic water tank is quite huge.

The next step

Now remove the access hatch situated on the top. Once this is accomplished, clean the interior of the tank using a pressure cleaner. This removes any sediment build-up at the bottom and on the walls of the tank.

After the initial rinse, add any anti-bacterial solution to the jet cleaner to ensure that the interior of the tanks is thoroughly cleaned.

The final step

Let the chlorine stay in the tank water for a minimum period of 12 hours. Subsequently, empty the tank and refill it with water. Leave the water for the next 30 minutes and then again test it for the chlorine levels.

If the reading is less than or equal to 0.5 mg/l, the water in the rainwater tank is considered as safe for consumption. In case of higher readings, you should repeat the entire process of draining, refilling and testing the residual chlorine levels.