Water heater expansion tank replacement

A water heater expansion tank serves as a compact reservoir situated along the cold water supply line leading to a water heater. Its primary function is to act as a safeguard for your water heating system and plumbing infrastructure by mitigating the potential damage resulting from thermal expansion.

When water is heated, it naturally undergoes expansion, causing an increase in volume. In a closed-loop plumbing system, this expansion poses a challenge, as the water has no outlet to accommodate this increase. Consequently, pressure builds up, potentially leading to issues such as leaks or damage to the water heater and the plumbing system at large. The expansion tank resolves this problem by providing a dedicated space where the expanding water can be safely redirected. This proactive measure reduces pressure within the system, thereby safeguarding its integrity.

Typically constructed from durable materials like steel or other substances engineered to withstand high-pressure conditions, the expansion tank is equipped with a rubber diaphragm or bladder that separates the air from the water. As the water expands during the heating process, it enters the expansion tank and compresses the air or bladder contained within. Subsequently, when hot water is utilized, and the temperature decreases, the water housed in the expansion tank is gradually pushed back into the primary water supply, maintaining a balanced system.