-Lead Free- Compliant with the Federal No Lead Law- For supply water pressures up to 300 lbs. and can be adjusted from 25 to 75 lbs. The standard setting is 45 lbs.- The by-pass feature incorporated into these valves accurately controls build-up of system pressure and thermal expansion by equalizing the system and supply pressure when relief setting is in excess of available supply main pressure.- Maximum temperate 180°F.- Stainless steel integral strainer.- High temperature resistant reinforced diaphragm for hot or cold water.