[urq] Correct "technical" name for hydraulic part

[Maurits Jonkergouw]

What is the correct technical name for the "valve block" P/N 857 612 063 A - this is where the (WR) brake accumulator, aka bomb houses - 

Unfortunately many people refer to "brake pressure regulator" when they mean "proportioning valve" and this widly extends my search results on the Audifans archive...

I would like know if the mentioned "valve block" could be rebuilded because the dealer quotes a HUGE amount of money for it.

Thanks
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Regards,
Maurits
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'86 quattro GV (WR)
'85 coupé KV
'82 coupé DD
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