Residential water pressure should not exceed 80 pounds per square inch, or psi, and outdoor irrigation systems typically have a water pressure of 30 to 50 psi. Sometimes water is supplied to houses at 100 or even 150 psi.
Water pressure gauges allow homeowners to test their own water pressure. A water pressure regulator can be installed at the water meter to protect the water supply line and irrigation system. When water pressure in a residence is too high, it can result in pipe damage, wasted water and leaks. Leaks caused by high water pressure sometimes only appear intermittently, as when toilets run when not being used.