Descaling on Mooresville water
Manufacturers write one descaling interval for the whole country, and it is set for hard water. Yours comes from the Town of Mooresville, and where that supply is soft the exchanger fouls considerably more slowly than that schedule assumes.
We will tell you honestly where you sit on that, because the alternative is descaling a unit annually that does not need it. Two caveats worth knowing before you skip it entirely: some manufacturers require documented annual servicing to keep the heat exchanger warranty valid, which is worth more than the service costs, and a property on a private well is a completely different conversation from one on the municipal supply.
- Descale on an interval that matches your actual water rather than the manual's default.
- Inlet filter clean, which is the most commonly skipped job and the cheapest.
- Flow rate and combustion check, so a declining unit is caught before it fails in January.

What Mooresville itself changes
The housing in Mooresville
Mooresville is genuinely two markets and one description will not cover both. The town-wide median build year is 2006, which puts the bulk of the housing in its first replacement cycle. But the 28115 ZIP holds around 1,562 homes built before 1950, clustered around the historic mill village, and those properties have completely different plumbing, different access and different failure modes. We ask which side of that line you are on before quoting anything.
Where the heaters sit
The Lake Norman side and the newer subdivisions are garage and closet installs, frequently with attic units in the larger homes. The pre-1950 mill village stock is crawlspace-dominant with tight clearances, and we price that access separately and tell you before the visit rather than after.