Re: Would like to keep old vintage toilet and convert to 1.6 gallons?
Around here, apartments, condos, duplexes, and pretty much everyone else has installed individual water meters to get away from run-away utility cost increases. Only a small handful of places come with water provided until you get out into the country where wells dominate.
A cheap 1.6 toilet that flushes well is under $100 and an easy enough job that I would replace an older one anyway, then take it to a non-profit recycle store for a tax write-off. Within under a year the whole thing pays for itself and the savings keep coming in. Guess I should have said that in my first reply!