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18-29-607.3.1  Pressure reducing valve.
   For water service system sizes up to and including 2 inches (50 mm), a device for controlling pressure shall be installed where thermal expansion has caused the pressure on the downstream side of a pressure reducing valve to exceed the main supply pressure. A pressure reducing valve with an integral bypass check valve or other device shall be installed to satisfy this requirement.
18-29-607.3.2  Backflow prevention device or check valve.
   Where a backflow prevention device, check valve or other device is installed on a water supply system utilizing storage water heating equipment such that thermal expansion causes an increase in pressure, a device for controlling pressure shall be installed.
18-29-607.4  Hot water supply to fixtures.
   The hot water supply to any fixture requiring hot water shall be installed on left side of the fixture.
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