A homeowner reports faucets that hammer and leak, and you measure 105 psi static. Besides installing arrestors at quick-closing valves, what is the primary corrective action?

Giải thích

Since 105 psi exceeds the 80 psi limit, the primary correction is a pressure-reducing valve to lower static pressure to 80 psi or less, which also reduces stress and hammer. Increasing pressure worsens the problem, removing aerators does not fix pressure, and doing nothing violates the 80 psi limit.