Warranties for a hot water heater are typically available directly from the manufacturer and often come packaged with the water heater. Water heaters commonly carry a limited warranty that covers the tank and various components.
Warranties are often available online at the manufacturer website, such as Rheem.com. Warranties obtained online typically require registering the hot water tank and downloading the warranty. Warranties are also commonly available from authorized dealers. Hot water tank warranties typically cover the first owner of the water heater, and sometimes cover subsequent owners if the water heater is not relocated. Hardware stores, such as Lowe's, typically offer an extended warranty that includes labor coverage.