Many of you have no clue what POTW stands for. But, it is the POTW that can create a problem for you and your customers. POTW stands for Publicly Owned Treatment Works, or in other words, the sewage treatment plant.
The Environmental Protection Agency regulates all POTWs. Included in these regulations are requirements regarding acceptable discharge into the public sewer system. Of course, this discharge comes from the sewers of various buildings -- the sewers that you are installing. The federal regulations apply to waste other than normal sanitary waste. Exempt discharges include water closets, urinals, lavatories, showers, bathtubs, drinking fountains, kitchen sinks and service sinks.