If your home has a water heater, chances are you also have an expansion tank. An expansion tank is a small, often cylindrical, tank that attaches to the water heater. Its purpose is to help protect the water heater from the damaging effects of thermal expansion.

Thermal expansion is a problem that can occur when water is heated. As water is heated, it expands. This can cause the water heater to become damaged or even to rupture. The expansion tank helps to protect the water heater by absorbing some of the expansion.

There are different types of expansion tanks, but the most common is the diaphragm expansion tank. This type of tank has a diaphragm that separates the water from the air. The diaphragm helps to keep the water from expanding too much and damaging the tank.

The expansion tank is an important part of the water heater, but it is often overlooked. Many people do not even know that they have an expansion tank. If you have a water heater, it is important to make sure that you also have an expansion tank.

The expansion tank is not a complicated device, but there are a few things to keep in mind when choosing one. Here are the top five expansion tanks, based on price, features, and reviews.

1. The first expansion tank on the list is the American Water Heater AMTROL EX-30. This tank is made of steel and has a capacity of 30 gallons. It is designed for use with electric water heaters. The tank has a maximum pressure of 100 psi and a temperature range of 40 to 150 degrees Fahrenheit. The tank also has a diaphragm that is made of butyl rubber. This tank is designed for use with water heaters that have a capacity of up to 50 gallons. The price of this tank is $$$.

2. The next expansion tank on the list is the Watts ET-30. This tank is also made of steel and has a capacity of 30 gallons. It is designed for use with electric water heaters. The tank has a maximum pressure of 100 psi and a temperature range of 40 to 150 degrees Fahrenheit. The tank also has a diaphragm that is made of butyl rubber. This tank is designed for use with water heaters that have a capacity of up to 50 gallons. The price of this tank is $$$.

3. The third expansion tank on the list is the A.O. Smith ATE-30. This tank is made of steel and has a capacity of 30 gallons. It is designed for use with electric water heaters. The tank has a maximum pressure of 100 psi and a temperature range of 40 to 150 degrees Fahrenheit. The tank also has a diaphragm that is made of butyl rubber. This tank is designed for use with water heaters that have a capacity of up to 50 gallons. The price of this tank is $$$.

4. The fourth expansion tank on the list is the Rheem RTG-30. This tank is made of steel and has a capacity of 30 gallons. It is designed for use with electric water heaters. The tank has a maximum pressure of 100 psi and a temperature range of 40 to 150 degrees Fahrenheit. The tank also has a diaphragm that is made of butyl rubber. This tank is designed for use with water heaters that have a capacity of up to 50 gallons. The price of this tank is $$$.

5. The fifth and final expansion tank on the list is the Bradford White BWE-30. This tank is made of steel and has a capacity of 30 gallons. It is designed for use with electric water heaters. The tank has a maximum pressure of 100 psi and a temperature range of 40 to 150 degrees Fahrenheit. The tank also has a diaphragm that is made of butyl rubber. This tank is designed for use with water heaters that have a capacity of up to 50 gallons. The price of this tank is $$$.

These are the top five expansion tanks on the market. All of these tanks are made of steel and have a capacity of 30 gallons. They are all designed for use with electric water heaters. They all have a maximum pressure of 100 psi and a temperature range of 40 to 150 degrees Fahrenheit. They all also have a diaphragm that is made of butyl rubber.

So, which expansion tank is the best? That depends on your needs. If you have a small water heater, then the American Water Heater AMTROL EX-30 or the Watts ET-30 would be a good choice. If you have a larger water heater, then the A.O. Smith ATE-30, the Rheem RTG-30, or the Bradford White BWE-30 would be a better choice.

No matter which expansion tank you choose, you can be sure that it will help to protect your water heater from the damaging effects of thermal expansion.