Addresses the design and installation of fuel gas systems and gas fired appliances through requirements that emphasize performance. Changes include:
- The section on protection of piping has been completely rewritten.
- Line regulators installed in rigid piping must have a union installed to allow removal of the regulator.
- Specific installation requirements were added for the safe installation of ANSI Z21.69 connectors for commercial cooking appliances.
- New text recognizes the use of dryer exhaust duct power ventilators (DEDPV) for installations that exceed the allowable exhaust duct length for clothes dryers.
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