What is the minimum required flow rate for a lavatory supply outlet?

The minimum required flow rate for a lavatory supply outlet is established to ensure that there is an adequate supply of water for everyday use, including activities such as handwashing and grooming. A flow rate of 0.8 gallons per minute meets the needs for typical lavatory applications while promoting water efficiency.

This standard is based on a blend of practical usage patterns and conservation efforts, considering factors such as user demand and the efficiency of fixtures. A lower flow rate may not provide sufficient water for effective washing and can lead to user frustration, while higher flow rates could promote water waste, contradicting modern plumbing efficiency initiatives.

In summary, the flow rate of 0.8 gallons per minute is optimal as it balances user requirements with water conservation objectives.