Hoses, Pipes
WARNING: This page is about a different car, the 2010 Volvo V70, 2009 Volvo V70, and 2008 Volvo V70. However, it is still accessible from the selected car via links, so may be relevant.
All connections, except to the expansion valve, have double O-rings and seals. The connection to the expansion valve has a single O-ring.
The O-rings are manufactured in a specially developed material (HNBR = hydrated nitrile rubber).