NATIONAL STANDARD PLUMBING CODE
“Liquid waste equipment”
6.1.1: Neutralizers shall be provided where required to prevent liquid waste containing ACID or ALKALINE waste or other harmful substances from entering a building drainage system public or private sewer or treatment plant or process.
6.1.6: a. Liquid waste treatment equipment shall be so installed that it is accessible for the removal of covers and the performance of necessary cleaning, servicing and maintenance.
“Neutralizing and dilution tanks”
6.6: a. Neutralizing or dilution tanks shall be provided where necessary to prevent ACIDIC or ALKALINE waste from entering the building drainage and sewer system.