Many water heaters feature an expansion tank to protect the system. Here's what a water heater expansion tank does and how you know if your system needs one.

Key Takeaways The cost to replace a water tank ranges from $825 to $6,100, with an average price of $2,000. The size and type of water tank are factors, with gas water heaters costing slightly ...

A thermo-expansion tank — or domestic water-heater expansion tank — is usually a small, air-charged tank with a rubber diaphragm inside that is installed on the water lines of the water heater.

Q: My 40-gallon gas water heater has started leaking from underneath, but there’s no problem getting hot water. What does this mean? A: It means the water heater’s tank is leaking and should ...

The expansion tank was mounted horizontally — just hanging there, he said — on the water supply line above the heater. The reader was concerned that the tank would cause stress on the connection.

Looking to replace your water heater? Learn the average cost of water heater installation and replacement.

The average cost to replace a water heater is between $800 and $1,600. Costs depend on the type, energy source, capacity and installation factors.

Consumer Reports tested a batch of tankless water heaters to see if they work as well and efficiently as storage tank water heaters. Here's what its engineers discovered.

Shopping for a water heater? Read about features, types, and other must-know topics in our water heater buying guide to make an informed choice.