Ariston ALTEAS ONE Net Series Installation And Servicing Instructions page 12

INSTALLATION
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.
Tundish
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
12 /
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 fi tting).
Tundish
trap
4. External termination of condensate drainage pipe via
condensate siphon
Tundish
External pipe length
max. 3 metres
(must be insulated)