Indeed Richard, Gas->Liquid as opposed to Liquid-> Gas - I knew I should have just posted a diagram or a suitable link instead ?! eg. http://blog.autointhebox.com/what-you-dont-know-about-your-automotive-air-conditioning-system.html
- Again I was simply trying to explain to JCMLuimini that the A/C system only has 'High' & 'Low' Sides by virtue of the (phase transition) nature of the refrigerant..... as opposed to Nitrogen and or a Vacuum (!)
JCMLuimini: Like Richard I don't know just how the system could apparently show different vacuum/N pressure characteristics between the High and Low sides either... unless, as he suggests. there is a blockage of some kind present...(?)
Now, referring to your original thread, ( in Oily Bits / https://rangerovers.pub/topic/3011-air-con and all your replacement parts ) it's bit of a long shot but (new) A/C components are often supplied with protective plastic plugs in the pipe ends / connectors etc of course (?)
- That's 'a long shot' because you usually can not fit them without removing these plugs..... but 'it depends' (eg. I had a case - not P38 - where someone fitted a replacement ABS Modulator but did not notice some of the plastic stop plugs fitted for shipping etc were transparent rather than the usual red/yellow/etc. The requisite BSP connector inserted/tightened onto that missed plug thus produced both a blockage and a leak... but at least it was "obvious" !)
EDIT: I see you started (yet) another thread about this JCMLuimini and that your own leak was actually 'obvious' too ?!
PS: "You're welcome" !