12
/
INSTALLATION
over
fl
ow pipe. The condensate discharge pipe must have a
minimum diameter of 22mm, must have a continuous fall and
preferably be installed and terminated to prevent freezing.
The discharge pipe must be terminated in a suitable position:
i) Connecting into an internal soil stack (at least 450mm above
the invert of the stack). A trap giving a water seal of at least
75mm must be incorporated into the pipe run, there also
must be an air beak upstream of the trap.
ii) Connecting into the waste system of the building such as
a washing maching or sink trap. The connection must be
upstream of the washing machine/sink. If the connection is
downstream of the waste trap then an additional trap giving
a minimum water seal of 75mm and an air break must be
incorporated in the pipe run, as above.
iii) Terminating into a gully, below the grid level but above the
water level
iv) Into a soakaway
Note: If any condensate pipework is to be installed externally
then it should be kept to a minimum and be insulated with a
waterproof insulation and have a continuous fall. The total
length of external pipe used should not exceed 3 metres.
Some examples of the type of condensate terminations can be
found below.
1. Internal termination of condensate drainage pipe to internal
stack.
2. External termination of condensate drainage pipe via internal
discharge branch (e.g. sink waste) and condensate siphon.
3. External termination of condensate drainage pipe via internal
discharge branch (e.g. sink waste - proprietary
fi
tting).
4. External termination of condensate drainage pipe via
condensate siphon
T
und
i
s
h
t
rap
T
und
i
s
h
t
rap
T
und
i
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T
und
i
s
h
Ext
erna
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i
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gth
ma
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3
me
t
res
(
mus
t
be
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a
t
ed
)
Condensate Discharge
Push
fi
t the
fl
exible condensate pipe into the outlet spigot on
the appliance. Cut to length and locate outlet into a tundish
