What is the maximum flow for a lavatory faucet?

What is the maximum flow for a lavatory faucet?

• A. 0.50 gpm
• B. 0.60 gpm
• C. 0.70 gpm
• D. 0.75 gpm

Answer: (D)

Max flow for a lavatory faucet is limited by the fixture’s flow control, usually the aerator and any built‑in restrictor. In many typical plumbing practice references and tests, lavatory faucets are rated to a maximum of 0.75 gallons per minute at standard test pressure. That’s the highest flow you’d expect from a properly installed, code‑compliant lavatory faucet with its restrictor in place. The other options are lower flow values the faucet could produce with smaller or different aerators, but they aren’t the maximum. So 0.75 gpm is the correct choice because it represents the highest allowable flow for a lavatory faucet under those typical testing assumptions.

Max flow for a lavatory faucet is limited by the fixture’s flow control, usually the aerator and any built‑in restrictor. In many typical plumbing practice references and tests, lavatory faucets are rated to a maximum of 0.75 gallons per minute at standard test pressure. That’s the highest flow you’d expect from a properly installed, code‑compliant lavatory faucet with its restrictor in place. The other options are lower flow values the faucet could produce with smaller or different aerators, but they aren’t the maximum. So 0.75 gpm is the correct choice because it represents the highest allowable flow for a lavatory faucet under those typical testing assumptions.