Getting the installation right in Matthews
The permit is the part that varies most between towns, and getting it wrong is what turns a one-day job into three weeks. In Matthews it goes through Mecklenburg County. We pull it where the work needs one and we tell you plainly where it does not, rather than adding a fee for a permit nobody filed.
We size on first-hour rating rather than raw gallons, because that is what decides whether you run out. A 50 gallon gas unit and a 50 gallon electric unit are not the same appliance in practice.
- Expansion control charged to your measured pressure. Tanks ship pre-charged at 20 to 40 psi and this region routinely runs far higher. Fitted unchanged, it is waterlogged from day one.
- A discharge pipe that will pass inspection: full valve size, no valves or tees, no threads on the end, terminating within six inches of the floor.
- Pan and drain line wherever the unit sits above living space, which in Matthews is decided by where the heater actually is.
- Refill and purge before energising on electric units. Powering an element before the tank is full destroys it in under a minute.
What Matthews itself changes
Where the heaters sit
Garage and crawlspace both common given the build era, with closet installs in the newer infill. Access is generally reasonable but the older subdivisions have tighter crawlspaces than the 2000s stock.
The pipe era
Matthews sits squarely in the polybutylene window, with 45.3% of the stock built between 1980 and 1999. If you have grey plastic supply pipe, that is a planning and insurance question worth separating from whatever your water heater is doing today.