What is the maximum flow rate for a private lavatory when the water pressure is 60 lbs. per sq. in.?

The maximum flow rate for a private lavatory, especially when influenced by water pressure, is typically determined by various plumbing codes and standards. In this case, a water pressure of 60 lbs. per square inch is relevant to the flow performance of a lavatory faucet.

The standard and commonly accepted maximum flow rate for a typical lavatory faucet is often set around 2.2 gallons per minute (GPM) at a water pressure of 60 psi. This rate balances the need for adequate water flow while considering water conservation practices. Many plumbing fixtures are designed to operate efficiently at this flow rate without sacrificing performance, making 2.2 GPM a standard specification for lavatory applications in residential plumbing.

Flow rates above this standard may lead to increased water usage, potentially violating local regulations focused on water conservation. Therefore, recognizing 2.2 GPM aligns with plumbing best practices and regulatory standards, justifying it as the maximum flow rate under the specified conditions.