My first Drake Toilet with Sanigloss installed in first floor bathroom 2006. I liked it so much I installed a second Drake Sanigloss in a second floor bathroom in 2008.
It's subtle, but the upstairs Drake toilet does not flush as vigorously as the down stairs one. Both were purchased from the same store. Both are 1.6L flush.
Stupid question, but is it because of second vs first floor? The flapper in the new Drake is already turning black whereas the flapper in the older is still bright red. The older toilet has a wrap around the chain where the newer doesn't.
It is possible to adjust anything so the upstairs toilet flushes stronger? The upstairs toilet is still better than most, but it seems just a slight bit anemic compared with the downstairs model.