Basics: Getting water from your hot water tank
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I like this brief article. While many people know that the water is there, many don't know how to get the water out. It has some important tips in it which explain how to practically remove the water and avoid contamination issues. The most likely issue you'll have is sediment in the bottom of the tank.
You should be checking to see if you have sediment issues NOW, not when you need that hot water.
Do you know where your electrical panel is? Do you know how to shut off the gas to your hot water tank? It will be one or the other. Do you know how to shut off the incoming water line?
Flushing a hot water tank often has to come from the top not the bottom if it's severely clogged with sediment.
Obviously if you wish to drink that water, you need a pristine hose. New hoses might have a rubbery taste, so they need to be flushed prior to using them for this purpose.
Would you drink that? This is why you need to check your tank for sediment today, not later when you need it.