Water taste and purity

See what Wikipedia has to say about legionnaires' disease. I play it safe and keep drinking water in a plastic milk bottle and change it daily.

You won't get legionellis from the action of drinking water.. Contaminated water needs to be atomised and inhaled, typically rarely used showers.
 
However, my experience is that having the tank empty for several months does seem to keep problems down.
Ditto.

We empty the tank each winter, and try to empty it between fillings.

On the advice of the previous owner, we don't use any sort of purification tablets or filters, and have not had any problems so far. Tap water is chlorinated anyway. We tend to fill up just before the off and leave it running over for a while. We wipe the end of the hose with a baby wipe before sticking it the filler. We drink it cold, straight from the tank, not just in cups of tea.

You can't get legionnaires from drinking water from a cold water tank.

Doesn't help the OP much though; I have heard that flexible tanks are particularly prone to infection, but I don't know why.
 
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I suspect a non return valve is only relatively non returning. It will always leak a small amount bit in the return direction. So what is it which could be slowly seeping back into the tank????
 
When we bought our current boat at 13 years old the water in the tanks seemed good. As a precaution I did a Milton treatment since I didn't know their history. On opening the tanks, the quantity of sediment/foreign matter could be wiped up with a finger tip (excepting the filler cap chain in one tank).

Now, 2 years on, the water tastes just like fresh tap water. No filters, no treatments in the last two years, just straight fills from well flushed marina hoses.

Maybe we're just lucky or maybe it's the toxin laden plastics Bavaria use in their cheapo tanks and pipework keeping the nasties away.
 
Has anyone who can't face drinking boat tank water ever been into their loft and had a good look in the cold water tank which supplies their bathroom basin cold tap, the water from which they brush their teeth with?

I think they might be unpleasantly surprised at what lies at the bottom of said tank.
 
Has anyone who can't face drinking boat tank water ever been into their loft and had a good look in the cold water tank which supplies their bathroom basin cold tap, the water from which they brush their teeth with?

No tanks in my roof - all my taps are mains-fed :)

No problem drinking the water in Ariam's tank though.

Pete
 
No tanks in my roof - all my taps are mains-fed :)

No problem drinking the water in Ariam's tank though.

Pete
I knew someone would say that. :)

Besides, what's all this tank water drinking about anyway? Morning coffee aside, drinking material generally comes in glass bottles or, at a pinch, cans.
 
Our water is direct from the mains. I drink a lot of water, it's good for you. I prefer mine either filtered, like at home, or out of a bottle.
 
A couple of seasons ago we discovered Yachticon Aqua Clean. This is a drinking water purification additive that uses silver salts rather than chlorine. No "chemical" taste. We also use a filter and replace the cartridge each year. Tank is a flexible one and I replaced all the piping with Hep20 a few years ago. We drink the water from the taps with no bother just occasionally it tastes a bit odd from a particular supply so the filter does not take everything out. It is no worse than our house supply which can be pretty horrible sometimes.
 
I fitted one of the inline activated charcoal filters.like these:-
http://www.marinescene.co.uk/category/530/water-filters/

Removed all the plastiky taste.

Note , they do not filter out naties to the best of my knowledge.
We still treat the water and only drink it boiled.

That's what we've got. Does what a Brita does; same stuff in the cartridge, no messing about with jugs, seems to last a season. One of the mags did a test of water filters recently - this one came out as average. There are some really posh ones on the market that are apparently very good but are (surprise, surprise) expensive.
 
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