DAKA
regular
Reged: 07/01/2005
Posts: 4368
Loc: Nomadic
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Has anyone tried flexible water tanks ?
My main water tank is 85 gals Aluminium, with a filler, gauge and a Flame arrester breather via a goose neck, all presure tested to 5 bar, it would in fact make a perfect Red Diesel/kerosene tank for my Webasto heating.
My thoughts are to fill the water tank with reduced duty red diesel before it goes up next year and then I could keep topping it up for the heater.
If I do this then a flexible drinking water tanks needs to be stuffed away in a dead space, how long would it last being bounced around at 25 knts ?
Could the set up devalue the boat or will a potential buyer recognise the benefits of a spare 85 gals of 'heating oil' on board 
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Moody
regular
Reged: 15/08/2007
Posts: 258
Loc: Home Midlands - Boat Hamble
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You must be psychic.
I am just sorting through all Moody Blue's paperwork in readiness for handing it over, and came across the bill for a flexible water tank that I fitted a year ago.
Moody Blue had an aluminium tank that SWMBO decided to add Milton to (not a good idea me thinks) totally buggered it.
As the tank is under the front bed the only way out was to cut it half, and obviously there was no way in for a new solid tank, therefore a flexi tank was the only option.
Had one custom made for £317.26, double skinned, no taste problems, a doddle to fit, and a slight weight reduction thrown in.
I did have my reservations at first but would have no hesitation doing the same again.
Neil
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Davido
regular
Reged: 25/08/2006
Posts: 880
Loc: Cardiff
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Why does Milton damage it?
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Moody
regular
Reged: 15/08/2007
Posts: 258
Loc: Home Midlands - Boat Hamble
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I am no chemist but I do know that whatever is in Milton Fluid reacts badly with aluminium. It started off with loads of spores on the inside of the tank, that looked like salt crystals, and these eventually ate their way through the tank, (took about 6 months we think).
Interestingly the manufacturer of the Flexi tank that I installed also says never to use Milton, as this reacts with the PVC.
Neil
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DAKA
regular
Reged: 07/01/2005
Posts: 4368
Loc: Nomadic
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You have me worried 
I use these
http://www.force4.co.uk/ProductImages/830178.jpg
Probably the same stuff but 'marine priced' 
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Moody
regular
Reged: 15/08/2007
Posts: 258
Loc: Home Midlands - Boat Hamble
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I don't think they are the same.
Aqua tabs are for water purification, and Milton is quite an aggresisve sterilising fluid.
To put your mind at rest have a look inside the tank, if there are salt like spores on the inside then.. oops you may have a problem.
Neil
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PCUK
regular
Reged: 29/06/2005
Posts: 2045
Loc: Devon
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I have two 25 gallon flexible from Air Cushion, (Hovercraft skirts) don't know if they are still going but the tanks are now 16 years old and as taste-free as ever.
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DAKA
regular
Reged: 07/01/2005
Posts: 4368
Loc: Nomadic
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Thanks, that is encouraging 
Usually my bright ideas fall apart but this one might work
I was a little bothered about capacity as all flexible tanks are small, are your bags just joined with a single pipe without the need for two breathers ?
I presume there is no need to empty for winter freezing as long as not left 90%+ full
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Scarron
regular
Reged: 22/06/2003
Posts: 213
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Try Hovercraft Consultants in totton - 023 0887 1188 [www.duratank.co.uk] we buy from them from time to time and their quality is good, don't know how competitive.
Paul.
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Sneds
regular
Reged: 26/02/2007
Posts: 3040
Loc: Bristol Channel
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Oops, we used Milton tablets in our last boat!
--------------------
"See the rainbow not the rain"
http://www.bristolchannel.co.uk/
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