WI-PRESSURE-REGULATOR-60 Water Inc Pressure RegulatorUndetected high water pressure is dangerous in any home.For a margin of safety, we highly recommend the water pressure regulator for use with our water, inc. products. Water Pressure Regulator installs in-line before water enters our products.dimensions: Length: 4” Circumference: 4.5”Maximum recommended water pressure for Water, Inc. products is 75 PSI. Pressure above 75 PSI indicates the absence of a properly functioning water pressure regulator at the property.