The downward force of water upon itself and other materials; caused by the pull of gravity.
A term that refers to the pressure of water related to the limitations of a water softener. Too low pressures may require a separate pump to be installed.
force per unit area exerted by the weight of water, each 33 feet of sea water exerts a pressure equivalent to one atmosphere, or 14.7 psi.
The force of water that exists in a piping system; measured in pounds per square inch (PS).
The rate, measured in terms of pounds per square inch (psi), with which water flows into a house. Normal pressure is between 50 psi and 60 psi, and should not drop below 30 psi or rise higher than 80 psi.