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3. installation
3.1.10 Codensate Discharge
To install the condensate pipe, push fi t the fl exible pipe into
the outlet spigot on the appliance, cut to length and locate the
outlet into a tundish.
The condensate discharge hose from the boiler must have
a continuous fall of 2.5
o
50mm into a suitable acid resistant pipe - e.g. plastic waste
or overfl 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.
Fig. 3.2
12
and must be inserted by at least
2. External termination of condensate drainage pipe via
internal discharge branch (e.g. sink waste) and condensate
siphon.
trap
Fig. 3.3
3. External termination of condensate drainage pipe via
internal discharge branch (e.g. sink waste - proprietary
fi tting).
trap
Fig. 3.4
4. External termination of condensate drainage pipe via
condensate siphon
Fig. 3.5
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