Baxi Platinum Combi 24 HE Installation & Servicing Instructions Manual page 18

Boiler
450mm min
Boiler
Sink
Boiler
Boiler
18
Termination to an internal soil and
vent pipe
External termination via internal discharge
branch
e.g sink waste - downstream
Termination to a drain or gully
Pipe must terminate above
water level but below
surrounding surface
Termination to a purpose made soak-
away
Holes in the soak-away must
face away from the building
7.6
FAILURE TO INSTALL THE CONDENSATE DISCHARGE
PIPEWORK CORRECTLY WILL AFFECT THE RELIABLE
OPERATION OF THE BOILER
The condensate discharge pipe MUST NOT RISE at any point
along its length. There MUST be a fall of AT LEAST 2.5°
(50mm per metre) along the entire run.
1. The condensate outlet will accept 21.5mm (
overflow pipe which should generally discharge internally into
the household drainage system. If this is not possible, discharge
into an outside drain is acceptable.
2. Ensure the discharge of condensate complies with any
national or local regulations in force.
BS 6798:2000 & Part H1 of the Building Regulations give
further guidance.
3. The discharge pipe should be run in a proprietary drain pipe
material e.g. PVC, PVC-U, ABS, PVC-C or PP.
Pipe must terminate
4. Metal pipework is NOT suitable for use in condensate
above water level but
discharge systems.
below surrounding
surface
5. The pipe should be a minimum of 21.5mm diameter and
must be supported using suitably spaced clips to prevent
sagging.
6. Any pipe fitted externally must not exceed 3 metres.
7. Any condensate discharge pipework external to the
building (or in an unheated part of it e.g. garage) must be
insulated to protect against frost. It is also recommended
that the pipe diameter is increased to 32mm.
8. If the boiler is fitted in an unheated location the entire
condensate discharge pipe should be treated as an external
run.
9. In all cases discharge pipe must be installed to aid disposal
of the condensate. To reduce the risk of condensate being
trapped, as few bends and fittings as possible should be used.
10. When discharging condensate into a soil stack or waste
pipe the effects of existing plumbing must be considered. If soil
pipes or waste pipes are subjected to internal pressure
fluctuations when WC's are flushed or sinks emptied then
back-pressure may force water out of the boiler trap and
cause appliance lockout.
Examples are shown of the following methods of termination:-
i) to an internal soil & vent pipe
500mm min
ii) via an internal discharge branch (e.g. sink waste)
iii) to a drain or gully
iv) to a purpose made soakaway
7.0 Site Requirements
Condensate Drain
3 / in) plastic
4