![]() (If the unit runs on electricity, simply turn it off. How do you ensure that the valve is functioning properly? Switch off the power to the water heater. In the future, follow these steps to drain a water heater: STEP 1: Check the pressure-relief valve.īefore you drain a water heater, check its pressure-relief valve-the means by which the tank keeps from bursting due to excess pressure. To remove sediment, you must drain a water heater not just for five minutes, but for as long as it takes to empty out completely. ![]() The fact that you witnessed clean-looking water come out of your tank does not necessarily mean you’re in the clear. Sediment builds up over time within the appliance, compromising its energy efficiency and leading to clogs in fixtures throughout the house. It’s smart to drain a water heater every year, no matter what type of storage tank water heater you own.
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