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16
Water Quality
All coffee beverages start with two things- coffee and water. Because the majority of espresso is water, it
should come as no surprise that quality water is important to the taste of the espresso. Water that is too high
in minerals can eventually create problems for your machine and even cause failures. Water that is too low
in mineral content can cause over-filling of the steam boiler. Either condition can degrade the quality of the
espresso. So what water to use?
CAUTION: Damage to the machine caused by poor water quality, particulate matter in the water, in-
sufficient mineral content, or other water-quality issues are not covered by the warranty. If you are
in doubt, take steps to assure that the water you are using is up to standards before using the DD.
The Vibiemme DD cannot use distilled or reverse osmosis (RO) water because these waters contain virtu-
ally no minerals. The water level sensor in the steam boiler requires a small amount of minerals to sense the
water level. Without these minerals being present, the boiler may be overfilled and that can cause numerous
problems including damage to the machine. These types of “pure” water can also leach copper from the boil-
ers and related plumbing in the machine, having the potential to eventually cause very expensive damage. On
the other hand, water too high in mineral content can cause rapid buildup of hard-water deposits known as
scale. The buildup of scale can reduce boiler volume, cause poor heating performance, slow water and steam
delivery, and can eventually lead to clogged water passages and even heating element failure.
Your water company should be able to supply you with water test data for the water supplied to your
home. If such information is not available to you, inexpensive water test kits are readily available for purchase
and these can be used to test the hardness of your water. At the minimum your should know the “General
Hardness” (also referred to as alkaline hardness) and the carbonate hardness of the water you are using. It is
beyond the scope of this manual to include detailed information regarding water quality and its effect on the
taste of the espresso and the life of your espresso machine.
For a DD connected to a plumbed water source, having an inline carbon filter can improve the taste of
the water as well by removing chlorine and other contaminants which affect taste. You may also wish to use
a particle filter which will keep sediment, sand, and other foreign particles carried in your water out of the
machine. If you find you have to clean grains of sand or small bits of minerals out of the screens on the home’s
faucets and the inlet screens on your washing machine, a particle filter is highly recommended. Beyond that, if
your water is high in carbonate hardness, a softener cartridge can remove virtually all traces of the carbonate
hardness, preventing scale build up as long as the softener system is effective. Consult your retailer to help
decide which possible solutions would work best for you.
NOTE: If you have any doubts as to the quality of your water, consult your local water utility or your
retail agent where you bought your machine and learn about water testing and treatment solutions.
It will help you make better espresso and extend the life of your DD.
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