This means that you need an expansion tank to hold up 13 additional gallons because, according to the previous formula, your volume is increased to 113 gallons. Another thing to consider when the size of the tank as an inch rule, should generally be 13 full when cold and about 12 full when hot.

For 1-2 people 30-40 gallons. For 2-3 people 40-50 gallons. For 3-4 people 50-60 gallons. For 5 people 60-80 gallons.

A small storage tank (50 to 60 gallons) is usually enough for one to two three people. An average storage tank (80 gallons) works well for three to four people. A large tank is suitable for four to six people.

The steel tank wrapped in Gallon's factory, with a diameter of 33 feet and a height of 8 feet.

In fact, if you do not know that your expansion tank will be able to safely accommodate your system, it is common practice to choose a expansion tank that is larger than the required size. Generally, it is preferable to oversize than to undersize.