Why should fittings be made of stainless steel in sewage systems?

The use of stainless steel fittings in sewage systems is primarily due to their excellent resistance to corrosion, which is critical in the anaerobic environments typically found in such systems. Sewage carries a variety of substances that can create harsh conditions, including acidic and corrosive materials. Stainless steel's composition makes it highly resistant to rust and degradation, ensuring longevity and reliability in these challenging settings.

In environments where anaerobic bacteria thrive, the production of hydrogen sulfide and other corrosive compounds can rapidly deteriorate materials that are not resistant, such as ordinary steel or certain plastics. Therefore, stainless steel fittings can maintain their structural integrity and functionality over time, reducing the risk of leaks and system failures.

This durability is pivotal for maintaining the overall efficiency and safety of on-site sewage facilities. Unlike other materials that may offer certain benefits, such as flexibility or reduced costs, those advantages do not outweigh the need for corrosion resistance in sewage applications where long-term reliability is paramount.