pyotr filipivich wrote:

"A pints a pound the world around" - water is approximately 8
pounds to the gallon. 200 gallons is three quarters of a ton.


Not in UK it isn't. A UK pint is 1.200949 USA pints, so a UK gallon is
about 10lbs.
In both languages, 1 cubic foot of water weighs about 62.43lbs, so the
proposed (80 cu.ft) tank would hold about 4994.4 lbs (2.23 tons) of water


--
Regards, Gary Wooding
(To reply by email, change feet to foot in my address)