can you please look page 3 of this of my bioler and tell me which pipes concern me? i would greatly apreciate that
http://vokera.co.uk/wp-content/uploads/2009/04/unica-he-installation-and-servicing-manual.pdf
http://vokera.co.uk/wp-content/uploads/2009/04/unica-he-installation-and-servicing-manual.pdf