"most plumbing fixtures are rated to 150psi"
"Water pressures on the City's northern border can reach 105psi"
"while unnecessary in Germantown, pressure regulating valves can be installed at the owner's expense"

What do Other Sources Say?
From ThePlumber.com
"80 is code throughout most of the U.S."

From Angie's List--
"Most plumbing fixture manufacturers recommend their products be used with water pressure no higher than 80psi. Anything higher than that can cause fixtures such as water heaters, faucets, shut-off valves and toilet parts to fail prematurely."

From PlumbingSupply.com
"To reduce water pressure supply you'll need a pressure reducing valve. In fact, these are often required by code for water pressures above 80psi."

From Kohler
Toilet fill valves, gravity toilet tanks, electro-hydraulic Toilets, pressure assist toilets and flushometers all have maximum water pressure at 80psi.
From Popular Mechanics
The typical inlet water pressure to a home is about 40 to 45 psi. Normally, it should not exceed 60 psi.
The typical inlet water pressure to a home is about 40 to 45 psi. Normally, it should not exceed 60 psi.
Is this "Excellence Every Day"? Really, truly?