Residential service lines operate at approximately what pressure?

• A. 1/3 psi - 0.3 psi
• B. 60 PSI
• C. 5 PSI
• D. 12-36 inches

Answer: (A)

Water pressure in a residential service is the push that moves water through the plumbing, and it’s measured in psi. For homes, the service line is designed to deliver around 60 psi, with regulators often set to about 50–60 psi to ensure good flow without overloading the pipes. If you convert units, 12 inches of water column is about 0.43 psi and 36 inches is about 1.3 psi, which is far below typical household pressure. So the value that matches normal residential service pressure is about 60 psi, while the other options represent pressures that are too low or use a different unit that doesn’t reflect standard home supply.