How old are your toilets? Old toilets could use as much as 7 gallons per flush 30+ years ago. Modern toilets use 1.6 gpf or less. Swapping out a 3gpf toilet th

How old are your toilets? Old toilets could use as much as 7 gallons per flush 30+ years ago. Modern toilets use 1.6 gpf or less. Swapping out a 3gpf toilet that came with the house for a modern one made a helluva difference in my usage.