Condensate Pipe Work; Internal Connections - Worcester 41-311-67 Installation, Commissioning And Servicing Instructions

3.4

CONDENSATE PIPE WORK

NOTICE:
B Where a new or replacement boiler is
being installed, access to an internal
"gravity discharge" point should be one
of the factors considered in determining
boiler location.
B The condensate pipe must be a minimum
of 22 mm Ø plastic pipe.
B The condensate pipe work must fall at
least 50 mm per metre towards the outlet
and should take the shortest practicable
route.
B Ensure there are no blockages in the pipe
run.
Key to condensate illustrations
1 Syphon trap
2 Soil and vent stack
3 Minimum 450mm and up to three storeys
4 Visible air break at plug hole
5 Sink or basin with integrated overflow
6 75 mm sink waste trap
7 Condensate pump
3.4.1

INTERNAL CONNECTIONS

In order to minimise risk of freezing during prolonged
cold spells, the following methods of installing
condensate drainage pipe should be adopted, in order of
priority.
Wherever possible, the condensate drainage pipe should
be routed and terminated so that the condensate drains
away from the boiler under gravity to a suitable internal
foul water discharge point such as an internal soil and
vent stack. A suitable permanent connection to the foul
waste pipe should be used.
1
22mm Ø
Fig. 10 Disposal to soil vent stack
6 720 644 743a (2010/10)
2
3
Alternatively if the first option is not possible an internal
kitchen or bathroom waste pipe, washing machine
waste pipe etc. can be used.
1
100mm
22mm Ø
75mm
Fig. 11 Disposal to a waste pipe
CONDENSATE PUMP
Where "gravity discharge" to an internal termination is
not physically possible, or where very long internal runs
would be required to reach a suitable discharge point,
condensate should be removed using a proprietary
condensate pump, of a specification recommended by
the boiler or condensate pump manufacturer.
The pump outlet pipe should discharge to a suitable
internal foul water discharge point such as an internal
soil and vent stack, internal kitchen or bathroom waste
pipe, washing machine waste pipe etc. A suitable
permanent connection to the foul waste pipe should be
used.
1
22mm Ø
Fig. 12 Condensate pump disposal
PRE-INSTALLATION
4
5
min.
6
4
5
75mm
min.
6
7
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