Quote:
Originally Posted by metoo21
It isn't needed if you have a whole house filter and softener.
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Sorry, to clarify, with a gas On-demand water heater you need to flush and de-scale it once a year or it will eventually stop working. It's about $100 ish to get this done if you don't DIY.
With an electric tank water heater you are right, No need to flush it especially if you have a whole house water filter. With gas tank, I would flush it once a year anyway just to make sure there is no sediment on the bottom pan making it less efficient over time. But in reality, very few do this maintenance.