Green Tool Kit: Water Conservation: Water Pressure
When water pressure is too high, it wastes water and causes stress to pipes and fixtures. Water should enter the property at 45 to 60 pounds of pressure per square inch (psi). You can check your water pressure with a pressure gauge that attaches to your outdoor/indoor faucet threaded for a ¾ inch hose bib, available at most hardware stores for around $10. Water pressure over 60psi can cause a strain on your plumbing fixtures or pipes and can even cause bursts in the water line. Pressure in excess of 80 psi may void warranties in some appliances and fixtures.
If your water pressure exceeds 70 psi, install a pressure-regulating valve, as depicted in Figure 4 and 5. Depending on the size and type of regulator, they cost anywhere from $40 and up, and can prevent future maintenance costs and leaks.