Originally Posted by georgelesley
That is neat info but I wish it would have addressed the lifespan of how long bleach lasts and is effective.
When you put bleach into your water tank, you kill all harmful life in the tank at that moment.
The bleach will degrade into salt and water in a chemical process that can take hours or days, according to how much sunlight and air exchange is present. In a water tank, the only air introduced is through the vent as water is drawn off and atmospheric pressure change. -- Not much if you're just storing the RV.
A couple of precautions to keep the water 'potable.'
Have a dedicated hose for filling the tank. Drain hose and store between use.
Only fill with treated 'city' water unless your well has been recently tested for safety. After long time RV storage, drain and sanitize the tank before use.
RV water tanks and plumbing is designed for storing and dispensing safe drinking water. Use of a Brita type filter to remove any taste from drinking water is fine, but folks that 'only' drink bottled water seems to me a bit over the top. The water tank is just a big plastic bottle.
The source of bottled water is filtered municipal water in most cases. It's just an extreme waste of energy in making plastic bottles, transport and disposal of those bottles after one use. In 1977 Perrier started heavily advertising their sparkling water in the U.S. and soft drink companies jumped on board to stop their market shares from shrinking by labeling treated municipal water as 'Glacier' or 'Mountain Springs' to appeal to people and drain their wallets.
The water is safe and cheaper from the tap than the one use plastic bottle. If the taste bothers you, use a Brita filter. JMHO.
The only time I've bought water in a plastic bottle is when flying. After passing through TSA security, I buy a bottle of water and carry it with and refill as desired. I've had one bottle bought in Cincinnati airport last me for a month or longer traveling in Australia!