To avoid confusion over debits and credits, avoid thinking of them in the way that they are used in everyday language, which often refers to a credit as increasing an account and a debit as decreasing an account. For example, if our bank credits our checking account, money is added to it and the balance increases.
One way to reduce the frequency of this occurrence is to maintain an air pocket at the top of the water heater tank. This air pocket will form in the tank by design - however, it will be reduced over time by the everyday use of your water heater. To replenish this air pocket: Turn off the water heater.
Report Abuse. Hot water heaters don't have mixing valves. If you have hot water coming out of cold water faucets, then you will need to replace/install a backflow preventer on the cold water line that goes into the water heater.hot water is backing up in your cold water lines.eport Abuse. Hot water heaters don't have mixing valves. If you have hot water coming out of cold water faucets, then you will need to replace/install a backflow preventer on the cold water line that goes into the water heater.