39
B
B
E
E
E
E
R
R
F
F
L
L
A
A
T
T
The
foam
layer
rapidly
disappears
:
the
beer
does
not
have
the
usual
fresh
brewery
taste.
CAUSE
SOLUTIONS
Greasy
glass
Do
not
wash
beer
glasses
with
other
glasses
which
have
contained
milk
or
other
fatty
substances.
Lipstick
is
a
greasy
substance.
Make
sure
to
remove
it
from
the
glass.
An
excess
of
germicides
builds
up
and
leaves
a
greasy
film
on
the
glass,
which
can
cause
a
flat
beer.
It
is
preferable
to
clean
glasses
with
steam
and
sterilize
them.
Meticulously
wash
the
glasses
with
a
good
detergent.
Do
not
use
soap.
Do
not
dry
the
glasses.
Let
the
glasses
dry
in
the
open
air.
Beer
drawn
incorrectly
in
the
glass
Open
the
tap
completely
and
rapidly.
Check
and
define
the
right
distance
to
hold
the
glass
with
respect
to
the
tap
while
drawing.
A
good
foam
is
creamy
and
dense,
and
the
head
should
be
2
to
3
cm
high.
Beer
without
foam
has
the
appearance
of
a
flat
beer.
Not
enough
pressure
Increase
the
pressure
if
the
beer
flows
too
slowly.
Aeration
holes
defective.
Check
all
the
seals
frequently,
particularly
the
aeration
holes.
A
clogged
aeration
hole
will
obstruct
the
flow
of
air
or
CO
2
.
Check
the
pressure
source.
Check
the
CO
2
tank.
If
it
is
empty,
replace
it
(following
the
appropriate
procedure).
When
the
keg
is
connected
and
the
pressure
is
correct,
the
pressure
must
always
remain
active
until
the
keg
is
empty.
If
the
beer
is
drawn
although
pressure
was
not
applied
earlier,
it
will
be
savage
in
the
beginning
and
flat
toward
the
end.
Beer
system
or
cooler
too
cold.
Using
a
precise
thermometer,
check
the
temperature
of
the
cooler
or
the
keg.
The
temperature
at
the
tap
should
always
be
at
least
two
degrees
less
than
that
of
the
cooler
or
the
keg.
Low
pressure
regulators
The
regulation
diaphragm
might
have
to
be
replaced.
Air
source
contaminated.
Greasy
kitchen
vapours
pumped
into
the
beer
will
cause
a
flat
beer.
Air
movement
rapid.
A
fan,
or
an
air
extraction,
or
a
draft
of
air
in
the
room
where
the
beer
is
drawn
can
cause
the
rapid
disappearance
of
the
foam.
Fans
or
blowers
should
be
placed
so
that
air
movements
are
not
directed
directly
to
the
spot
where
the
beer
is
drawn.
Summary of Contents for DB66
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