All drainage connections and water supply connections
on air-conditioning equipment shall meet the requirements of this
chapter. Before installing any water-supplied air-conditioning equipment,
a permit therefor shall be obtained from the Plumbing Subcode Official.
All hot water storage tanks directly heated
shall be provided with a temperature relief and pressure relief valve,
guided to a sink or terminating at the floor, so as to avoid the possibility
of scalding. All such automatic gas heaters or oil heaters shall be
connected with a flue to the outer air.