Can you install water heater without expansion tank?

Water expands as it heats up, and without an expansion tank attached to the water heater, a closed plumbing system can experience damage from this thermal expansion.

Is the expansion tank part of the water heater?

A water heater expansion tank is another small tank that is attached to the water supply pipe of the water heater. The expansion tank is designed to handle the thermal expansion of water as it heats up in the water heater, preventing excessive water pressure.

When should a water heater expansion tank be used?

An expansion tank is always highly recommended if you have a ‘closed-loop system’ caused by any kind of check valve or pressure regulating valve installed on your house’s water supply line. A common illustration compares having high water pressure in your home to having high blood pressure.

What size expansion tank is needed for a 50 gallon water heater?

2-gallon
You need a thermal expansion solution that is adequately sized for your plumbing system. One 50-gallon water heater, for instance, can be served by a 2-gallon expansion tank.

Can a water heater be used without an expansion tank?

In fact, some manufacturers may void your water heater warranty if you have a closed plumbing system without an expansion tank. Now that you know why you need an expansion tank, let’s look at how to tell if you have a closed plumbing system.

Is it necessary to install a thermal expansion tank?

Thermal expansion protection is required on new water heater tanks. Thermal expansion protection can be done 3 different ways: installing a thermal expansion tank properly sized for the tank

What does it mean when your water heater expands?

Here’s what we mean: When water is heated inside your water heater, it expands. This is called “ thermal expansion ”. For example, the cold water in a standard 50-gallon water heater expands to 52 gallons when heated to 120°F. That extra water volumeraises the pressure in your water heater to dangerous levels.

How does an expansion tank affect water pressure?

An expansion tank prevents pressure increases due to thermal expansion of your water. As your water is heated from 50° F to 120° F, it expands by approximately 2%.

Is an expansion tank really necessary for a hot water heater?

From a building code perspective, expansion tanks are not required for tankless water heaters where no storage tank for hot water is installed. In most cases, they are used as a preventative measure to prolong the life of your water heater and reduce the risk of ‘overworking’ your plumbing system.

What are the symptoms of a bad expansion tank?

There are several signs of thermal expansion tank problems. One of these signs is slow flowing or low-pressure water coming from your water heater. This can be a sign of mineral buildup and of your expansion tank failing. Another sign of expansion tank problems is condensation.

Do I need a new hot water tank?

If your hot water is rusty, your water heater could be rusting on the inside, and it might start leaking soon. To see if your hot water is rusty, fill three or four five-gallon buckets or other containers. If rust comes from hot water only, you probably need a new water heater.

When do you need an expansion tank?

An expansion tank is required if a plumbing system is “closed”, which means that the back-flow that normally runs between the house and the main water supply, is blocked. However, when water is heated, it starts to expand, which causes a rise in water pressure.