Is a tankless water heater right for your Mustang home?
A gas tankless heater fires a much larger burner than a tank heater, but only while hot water is running. That burst of demand is where many installs go wrong. Mustang follows the International Fuel Gas Code, which governs how gas piping is sized for the combined load of every appliance on it. Piping that comfortably fed a tank heater, a furnace and a range may not carry a whole-house tankless unit without upsizing part of the run.
Venting is the other half. Tankless units need their own vent, routed to the manufacturer's clearances, and switching from a tank often means a new vent through a wall or the roof. In Mustang's 1970s and 1980s homes, the heater may sit in a garage or hall closet with a flue sized for a tank, not for a tankless unit.
Homes built since 2000 make up roughly four in ten Mustang houses, according to Census data, and many of their original tank heaters are reaching replacement age. That's usually when the tankless question comes up. We check the gas meter, pipe sizes and vent path before quoting, so the decision is based on your house, not a brochure.
Tankless water heater flushing and descaling
A tankless heat exchanger has narrow water passages. Minerals that would settle at the bottom of a tank coat those passages instead. Mustang's city wells tap the Garber-Wellington, which the USGS classes as a calcium and magnesium bicarbonate water, exactly the chemistry that leaves scale on hot surfaces. On a private well, nothing gets blended in before it reaches the heater. Scale shows up as swinging temperatures, reduced hot water flow, or a scale or overheat code on the display.
Descaling clears it. With the isolation valves shut, we hook up hoses and a pump, run a mild acid descaler through the exchanger until the scale dissolves, rinse it with fresh water and pull the inlet screen to clean out grit. The right interval depends on your water and how hard the heater works, so we set a schedule after we see how much scale the first flush removes. Units missing isolation valves get a set added, which makes every later flush quicker.
Our tankless installation and repair process
- Load check. We total your gas appliances and check the meter and piping against the new unit's rated input.
- Plan the vent. We pick a route that meets the manufacturer's clearances and city code.
- Install with valves. Every unit gets isolation and flushing valves, a pressure relief valve, and a condensate drain where the model needs one.
- Permit and test. We pull the City of Mustang permit, leak-test the gas piping and confirm temperature and flow at the fixtures.
Models, efficiency and cost factors are covered under tankless water heater installation and repair. For everything else in town, see our Mustang plumber page.