Baxi Potterton Gold HE A Range manual Condensate Drain

Termination to an internal soil and

Boiler

vent pipe

	50mm	per
		metre
			of
				pipe
2.5°	Minimum			run
		fall

Fig. 13 450mm min

External termination via internal discharge

Boilerbranch

e.g sink waste - downstream

7.0Site Requirements

7.7Condensate Drain

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 (3/4in) plastic 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.

Sink

Fig. 14

50mm	per
	metre
	of
		pipe
2.5°	Minimum	run
	fall

Pipe must terminate above water level but below surrounding surface

3.	The discharge pipe should be run in a proprietary drain pipe
material e.g. PVC, PVC-U, ABS, PVC-C or PP.
4.	Metal pipework is NOT suitable for use in condensate
discharge systems.
5.	The pipe should be a minimum of 21.5mm diameter and
must be supported using suitably spaced clips to prevent
sagging.
6.	It is advisable to keep the condensate pipe internal.
7.	External runs greater than 3 metres or runs in cold areas
should use 32mm waste pipe.

Termination to a drain or gully

Boiler

Pipe must terminate above water level but below surrounding surface

50mm	per
		metre
		of
		pipe
2.5°		Minimum	run
		fall

Fig. 15

Termination to a purpose made soak-

away

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 - Fig. 13

Boiler

50mm	per
		metre
		of
		pipe
2.5°		Minimum	run
		fall

500mm min

Holes in the soak-away must face away from the building

ii) via an internal discharge branch (e.g. sink waste) - Fig. 14

iii) to a drain or gully - Fig. 15

iv) to a purpose made soakaway - Fig. 16

Fig. 16

© Baxi Heating UK Ltd 2008 17