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The indirect waste receptor and drainage piping shall be sized to drain the maximum discharge flow rate from the relief port as published by the backflow preventer manufacturer. The termination of the piping from the relief port or air gap fitting of the backflow preventer shall discharge to an approved indirect waste receptor or to the outdoors where it will not cause damage or create a nuisance.

Related Code Sections

P2902.6.3 Water Supply and Distribution, Relief Port Piping
The indirect waste receptor and drainage piping shall be sized to drain the maximum discharge flow rate from the relief port as published ...
P2902.6.3 Water Supply and Distribution, Relief Port Piping
The termination of the piping from the relief port or air gap fitting of the backflow preventer shall discharge to an approved indirect waste ...
7.1.2 System Requirements, Relief Valves
Unless the requirements of 7.1.2.2 are met, a wet pipe system shall be provided with a listed relief valve not less than 1/2 in. (12 mm) in size ...
7.1.2 System Requirements, Relief Valves
Unless the requirements of 7.1.2.2 are met, a wet pipe system shall be provided with a listed relief valve not less than 1/2 in. (15 mm) in size ...