Many thanks for your helpful responses and apologies for late reply, have been away.
The boiler is not Neon, it is a Xeon 50 by Saunier Duval. Here is the link:-
http://www.saunier-duval.co.uk/manuals/pdf/current_products/installation_Xeon60ff.pdf
This spec' confirms that the vent and feed tees are the wrong way round.
I am happy to reverse them but just wonder if it is going to make a big difference, given that the two tees are only some 8cm apart ?
The boiler is not Neon, it is a Xeon 50 by Saunier Duval. Here is the link:-
http://www.saunier-duval.co.uk/manuals/pdf/current_products/installation_Xeon60ff.pdf
This spec' confirms that the vent and feed tees are the wrong way round.
I am happy to reverse them but just wonder if it is going to make a big difference, given that the two tees are only some 8cm apart ?