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INSTALLATION
Codensate Discharge
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
overflow 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.
Tundish
Condensate Discharge
Push fit the flexible condensate pipe into the outlet spigot on the
appliance. Cut to length and locate outlet into a tundish
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.
Tundish
trap
3. External termination of condensate drainage pipe via internal
discharge branch (e.g. sink waste - proprietary fitting).
Tundish
trap
4. External termination of condensate drainage pipe via condensate
siphon
Tundish
External pipe length
max. 3 metres
(must be insulated)
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