In 1994 a law was mandated by the federal government to regulate that the new toilets were to use no more than 1.6 gallons of water per flush. The manufacturers then had to develop a toilet that would properly clear the bowl and carry the waste to the septic system or the city sewer. The first models that were introduce were cause for complaint, so the manufacturers have developed new flushing technology and enlarged internal passageways resulting in a properly functioning toilet. There is also a toilet known as a power flush commode which uses a pressurized tank to produce a surge of water that enters and clears the bowl of any waste. Although they are not as quite as conventional models, they work well and are like commercial toilets.