The lower priced gallon of milk will always sell before the nicely marketed expensive one. 

Turns out when you open the lid, instead of trash, you get a 10-foot-deep, couple-hundred-gallon tank of fecal filtered water.Yours truly was down right in the middle of it.

I also have data now that the average usage of the tenants in the house is 300-450 gallons per day.

I had a 40 Gallon hot water heater go out last week.

Instead of 1 family in 1 house as in Pablo's example in your link above, I have 2 80-gallon, in tandem w/h's that service 7 units for instance.   

We get 5 gallon buckekts of paint for $15. 

A gallon of paint costs the same no matter what color is on the inside.

Silent toilet leak. old flapper. will leak 1,000-3,000 gallons like nothing in a month.been there, done thatchange your toilet internals. or change to good new toilets

Thank you for your input, we did some more research and found out from the town that it is a traditional septic and the septic capacity is 750 gallons, the third bathroom is legal and they have a receipt for it being serviced in August 2015 and the septic was reported as being in good condition, however it hasn't been officially inspected in a number of years.

For my washing machines I pour a gallon of RV antifreeze in the drum.