Definition of FEN. : low land that is covered wholly or partly with water unless artificially drained and that usually has peaty alkaline soil and characteristic flora (as of sedges and reeds).
The average American family uses more than 300 gallons of. water per day at home. Roughly 70 percent of this use occurs. indoors. In addition, there are other miscellaneous uses of water in the house which may be very significant, depending on the. degree of water conservation by the household.
The average amount of water used in a flush has varied over time. Toilets from the 1950s use as much as eight gallons per flush. Over time, the total amount per flush has gone down drastically. Currently, the average toilet manufactured today uses about 1.5 gallons per flush.