If I install aerated flow restrictors at each fixture is there an advantage to reduce the water pressure from 60 to 40psi?

Why change to 40#. That's low for a house. If you are using water and turn on a washer it will take much longer to fill.

Hello MBGPE

I agree with the expert above why would change it 40 psi, if the water pressure is between 40-60 psi it is OK, read the instruction below, Thanks.

John

What is considered normal water pressure? There really is no such thing as "normal" water pressure. Since water pressure is influenced by the elevation of the reservoir that serves your neighborhood versus the elevation of your water meter, water pressure varies from property to property. Water pressure in the District typically ranges from 45 - 125 psi; however, typical residential systems are designed to function best under a pressure of 40 - 60 psi. If the water pressure entering you home exceeds this level, you should install a pressure regulator in the line to reduce the pressure to an acceptable range. This protects your equipment and piping in your home from damage from excess force exerted by the water. Symptoms of high pressure include "clanging" or "rattling" of pipes that occur when a faucet, dishwasher, or washing machine shuts off; water heater pressure relief valve malfunctions, and reoccurring leaks. The symptom of low pressure is typically a noticeable reduction of flow.