I once had occasion to flush a Soviet toilet. Pulled the overhead chain and It went off like a rocket-powered Martin Baker ejection seat. My estimate was something like 600 gallons of water blew through it in about 3 seconds.
It actually kinda scared me for a second. It felt like it might suck me right in. Designed without the slightest concern for water efficiency.
Wish they sold those here instead of these low flow fixtures.
I once had occasion to flush a Soviet toilet. ==
I remember them too. The tank sitted on upper tube close to ceiling. That is why when you pull the plug it makes so strong water flush. But the amount of used water was SMALLER actually them with today modern toilets. Just consider the tank of soviet toilet was about just 1 gallon only. Compare it with modern toilet tanks.