No real standard, it's dependent on giving enough clearance for a trap with at least a 50mm seal and taking into account the bath panel and then set the height accordingly. It is easier to cut the bath panel than the floor though.
From the bottom of the trap to centre of the outlet, not the AAV?? The deeper the seal the taller the trap, (50/50/75mm water seal), the largest of Mcalpine's 3 is around the smaller of your 2 though?? 190mm is huuuuuge, never come across one that large unless it wasn't a bath trap, a P trap or similar?
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