Quote:
Originally Posted by metoo21
We will just have to agree to disagree. If you filter out any sediment prior to tank or tankless water heater there won’t be sediment in either. And if you soften the water there won’t be any calcium or magnesium to cause scale in either heater.
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Sorry but filters only remove most of the sediment and softeners replace most of the calcium and magnesium with salt. Any water heater tankless or on demand, gas or electric should be flushed periodically if you want it to last longer. Prove it to yourself: get a pot of water from your tap, now boil it for a while, 1/2 hour maybe. Empty pot, do you see that white residue? That’s a hint as to what’s going on inside your water heating unit. You can further test by not cleaning pot and boiling more water and watch the residue build.