Q radiator Expansion/ header tank

[Tilly819]

Hi all, for IVA does the radiator header/expansion tank have to have a min and max level indicator????? and or be made of see threw materal ???

Im kinda hoping not since iv made a nice one out of some 2 1/2 inch stainless pipe with some end camps, but thought id best ask, couldnt find anything in the manual but might have missed it>

Chears Tilly