Bradford White always recommends an installation that allows for thermal expansion whether through an expansion tank or other means. It reduces the stress on your hot water system and its various components including pipes, fittings, fixtures, and even your appliances. A thermal expansion tank may be also required to meet your local plumbing codes. If the water heater is installed in a closed water supply system, such as the one having a back-flow preventer in the cold-water supply, provisions should be made to control thermal expansion. DO NOT operate the water heater in a closed system without provisions for controlling thermal expansion. A plumbing professional can assess your specific system and determine during installation how best to control thermal expansion. Need a plumbing pro? Find one here.Recovery is the amount of gallons a water heater can typically heat in an hour. So it is measured in gallons per hour (GPH). Recovery is a direct result of energy input and temperature rise. It varies among models depending on the tank capacity, heat source, and the size of the burner or element. Plumbing pros can use that among other factors to help determine the right water heater for a specific homeowner’s needs. Visit this page  and enter your water heater’s model number or serial number (help finding those is also on that page). Your water heater’s information will be listed including links to the available technical documentation and manuals for your model.Bradford White offers a large selection of water heating products that qualify for rebates across the United States and Canada. To see if your water heater qualifies, visit our Rebate Center and enter your water heater’s model number and your zip code/postal code. Need help finding your model number? Click here.If your current water heater is a Bradford White, you can visit our My Water Heater Information page and enter your water heater’s model number or serial number. The page also has instructions on where to find those numbers. Your water heater’s information will be available, including a link to the Specifications, which contains the dimensions for your model.To find a pro near you, click here.See our service bulletin regarding rusty water here. Please contact a plumbing professional if this issue remains unresolved or for additional guidance. Need a local Pro? Find one here.You can find some helpful tips on whether it is time to replace your water heater here. If you are currently having performance issues with your water heater, you should have a plumbing professional evaluate whether they can be fixed or if a replacement is a better option. They can also help you find the best Bradford White water heater for your needs. Need a pro? Find one here.Addressing this issue requires the help of a plumbing professional. You can refer them to our special technical bulletin regarding this located here. Need a local Pro for this service? Find one here.This is an integral feature on the ICON® gas valve system designed to assist the professional plumber with operation and troubleshooting. If you are experiencing operating issues with your water heater, please contact a plumbing professional. Want the technical documentation and manuals for your water heater? You can find them here.