I don’t know how true that water will flush out some alcohols remnant in the body but I know water is a very good substance that we need in the body. Let the ratio of water intake to alcohol be even 2:1, it will have less effect in the body and the best thing to do is to stop the intake of alcohol since we know the repercussions of it.
Water is very good for the human body, especially for those that consume lots of alcohol and substance that affects the liver and kidney, it helps flush substance down the stomach and stop harmful organisms from building up in the body system. According to research, to maintain a healthy kidney, regular consumption of water is highly needed. However some people rather prefer taking harmful Alcoholic substances on a regular than water which is very dangerous to the body system.
Also it's not only about the liquor people consume but also what they inhale. Alot of individuals in our society lately, especially the youths are into smoking Cannabis and it's kinds, which can be very harmful to the lungs and kidney and most of them don't even go for regular checkups or take substances that would help flush their system. Now this is where water plays a good role, research says that women should consume, 8 times of 200ml of water daily while men should take 10 times of same amount to help flush their system and keep the kidney functioning properly.