What is the purpose of sealing existing building sewer connections?

Sealing existing building sewer connections is crucial to preventing backflow, which occurs when wastewater flows back into the building instead of being drained away properly. Backflow can happen due to various reasons, such as blockages in the sewer line, heavy rainfall causing surcharging in the public sewer system, or a significant drop in pressure in the drainage system. By sealing these connections, you effectively create a barrier that stops sewage from re-entering the building, protecting the interior from contamination and reducing the risk of health hazards associated with sewage exposure. This practice is particularly important in maintaining the overall plumbing integrity and ensuring compliance with health and sanitation codes.

Although preventing odors, enhancing flow, and ensuring safety are all important considerations in plumbing systems, they are not the primary reason for sealing existing sewer connections. Sealing primarily targets the critical issue of controlling backflow, ensuring that wastewater is properly managed without risking contamination of living spaces.