What protects sewer lines from pressure and temperature when blowing down a boiler?

Blowdown tanks are specifically designed to handle the pressure and temperature associated with discharging water from a boiler, which may contain a high concentration of dissolved solids. When a boiler is blown down, it releases a mixture of water and steam, which can lead to rapid changes in both pressure and temperature.

The blowdown tank serves to safely cool and depressurize this discharge water before it enters the sewer system. Inside the blowdown tank, the high-pressure water from the boiler is allowed to expand and cool, thereby preventing thermal shock and pressure surges that could damage sewer lines or introduce hazards into the sewer system.

By capturing this hot water and allowing it to cool, the blowdown tank ensures that the sewer lines do not experience the stresses and strains that sudden changes in temperature and pressure could create. This is crucial for maintaining the integrity of the plumbing systems and preventing costly repairs or failures.