A thermal expansion tank may sound like another frivolous addition to an already expensive heating system. However, if the water heater breaks down, its absence will be felt immediately.
Therefore, having an expansion tank installed is essential for peace of mind.
WHAT IS A THERMAL EXPANSION TANK?
A thermal expansion tank is a safety device that one can fit on an existing water heating system. Despite its small size, it’s invaluable in preventing damage to the entire system.
THE WATER HEATING SYSTEM
When liquids are heated, they expand. Some liquids may transform into a gaseous state. An open plumbing system can easily return excess water to the city’s mains. However, in a closed system, the options are more limited. Most closed systems have one-way valves that regulate and keep water within the system. A common example is the pressure regulation valve (PRV).
When the pressure from heated water gets too much, the regulation valve does its best to even things out. It can only handle so much, though. Any excess pressure can damage the entire system over time.
Such debilitating effects include:
- Too much pressure on the PRV
- The reduced lifespan of the entire system
- Leaks in the pipes and outright ruptures
- Water wastage through leaks and the regulator valve release
That’s where the thermal expansion tank comes in. The tank has two parts: one for water and the other for air. This gives the expanding water in the pipes a place to back up when the pressure gets too much.
BENEFITS OF INSTALLING A THERMAL EXPANSION TANK
A professionally installed thermal expansion tank mitigates the potential damage that excess pressure can cause. Here’s what makes it such a useful addition to any system:
- Prevents damage: By providing more room for expanding water, the tank will regulate pressure buildup and the leaks and ruptures that can ensue.
- Better efficiency: Higher pressure systems require more heat to meet their temperature requirements. An expansion tank reduces pressure and, therefore, the power bills.
- Inexpensive: Compared to repairing a heating system, a tank is relatively cheap, costing around $220.
- Durable: A thermal expansion tank is built to last. If a tank is properly matched with the incoming water pressure, then a reliable tank can last up to 10 years.
- Security: A tank provides an extra method of relief beyond the PRV. Knowing the basement won’t be flooded suddenly can provide extra peace of mind.
INSTALL THE EXPANSION TANK THE RIGHT WAY
Despite its many benefits, the thermal expansion tank has one major problem: improper installation. Any adjustments to a system’s plumbing can be a tricky undertaking. To save on repair costs further down the line, do it right the first time and use a professional water heater installer.