Eau Source EVA Manual page 7

system – a pocket of air could slow down the flow. If it seems this hasn't
been done, rinse once again, taking care to immerse correctly until all
bubbles have dissipated.
Why is it that the water sometimes filters at a slower rate than the 45
minutes per litre stated in the booklet?
The rate given is an approximation: subject to the quality of origin of the
water being filtered by your EVA, the time taken will vary from 30 minutes
to 1 hour per litre maximum.
If there is a white chalky deposit in the bottom of the EVA Advanced
Water Filtration System, is this normal and is it lime scale? Is this related to
the filtered water leaving a chalky scale residue when used for cooking/
boiling?
Don't worry. It is not calcium carbonate (lime scale) but minerals such as
natural silica originating from the mineral tray which induce the alkaline
level of the water (see scientific analysis, on page 18 of this leaflet). White
deposit may be visible during the 9 month life of the filter cartridge. These
undesirable residues are in fact harmless to the body and to electrical
appliances – coffee machines, electric kettles. (If you choose not to use the
mineral tray, this deposit will disappear, but you would miss out on all the
benefits of these minerals...). If a white film appears on the surface, in the
lower compartment, or if your mineral tray is covered with a green layer:
boil some water and add a spoonful of salt, then place the mineral tray in
it for 5 minutes. Then rinse it under clean water before putting it back into
the water filtration system.
Does EVA filter fluoride?
Yes, in the form of numerous chemical elements present in tap water:
fluoride is found in related forms (potassium fluoride, sodium fluoride etc)
i.e. fluoride alone doesn't exist in a 'free' form in our tap water. (See
analysis table.)
What is the difference between fluoride and fluorine?
The fluoride atom has the international common denomination F, while
fluorine is the form linked to the fluoride atom with a second chemical
element e.g. calcium, potassium etc.
12
What percentage of nitrates should be filtered out?
The actual amount will vary depending on the water used. On average
between 60 and 90%.
Does it filter salt (sodium)? If so how much and why isn't it in the Analysis?
The filter is not designed to filter brackish water e.g. containing sea salt
but rather the 'chlorides' dissolved in water in all their forms: calcium
chloride, sodium, magnesium etc, in acceptable proportions and in
accordance with European norms – note the chemical name Cl on the
analysis table.
Can hormones be filtered?
Unfortunately not. No current system available to the public would be
able to remove hormones, whose molecules are much too 'fine' to be
withheld.
The ceramic is discolouring very quickly, is this normal?
Yes! The ceramic is effectively a pre-filter, a waste unit retaining the
first impurities of the tap water. If it remained white it would indicate
2 eventualities: either the water contains no impurities, or the filter is
ineffective. On the contrary we have never found that the ceramic remains
immaculate. So, with time and despite its maintenance, the ceramic will
discolour.
There is green mould on mineral tray. Why is it there and how can it be
removed?
These green single-celled algae are undesirable but harmless, and are
naturally occurring in plumbing and the water supply. Once you set your
EVA filtration system running, it may be that after rinsing with fresh water,
you trigger the growth of the algae, originating from the mineral tray.
To remedy this, follow our product care guidance on pages 10-11(before
this FAQ section).
13