What is the maximum water usage for Ultra Low Flush (ULF) toilets?

The maximum water usage for Ultra Low Flush (ULF) toilets is set at 1.6 gallons per flush. This standard was established to promote water conservation and reduce the water waste associated with older toilet models, which often use much more per flush. ULF toilets are designed to effectively clear waste while using significantly less water than traditional toilets, which can use upwards of 3.5 to 7 gallons per flush. The 1.6 gallons limit has become the benchmark for efficiency in residential and commercial plumbing systems, ensuring that users can do their part for the environment without sacrificing performance. This standard has been adopted in various plumbing codes and regulations aimed at improving water efficiency.