Water Storage for Washing Cars.

[notorious]

I have 650 litre tank. I fill the tank when there is no ban from tap. I use the water from tank during the ban. The tap remains closed during the ban because I have taken water from the system, paid for it and put it to tank when it was allowed.

Don't wash my car with rainwater.

Edit: 650 litres is enough to wash car 10 times with a pressure washer.