Water pressure. What is water pressure? Why is it important? What controls it? Well, some areas of your city have low water pressure and some have high water pressure. If your home is in a zone with high water pressure, you might have an important mechanical component called the "Regulator". This device protects your home from rising water pressure, especially while you sleep. Have your water pressure tested by a qualified plumber. Protect your home. Your home deserves it.