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Last edited 09 Jul 2021
The 2018 International Residential Code (IRC), published by the International Code Council (ICC) defines a plumbing appurtenance as: ‘A device or assembly that is an adjunct to the basic plumbing system and does not demand additional water supply or add any discharge load to the system. It is presumed that it performs some useful function in the operation, maintenance, servicing, economy or safety of the plumbing system. Examples include filters, relief valves and aerators.’
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