Water Heater Repair in Preston Hollow & North Dallas

Three of the postal areas here are shared with other cities. Highland Park and University Park, the Park Cities, are separate municipalities that sit inside 75205 and 75225, so one street can be Dallas and the next can be Highland Park, with different permit offices and inspectors. Only the Dallas portion falls under City of Dallas rules, which require a permit for water heater replacement.

Check the city on your property tax bill, not the mailing address. Preston Hollow itself was its own incorporated town from 1939 and annexed by Dallas in 1945, which is why its boundaries are described differently depending on whether you mean Old Preston Hollow, north of Walnut Hill, or the broader area bounded by Midway, Hillcrest, Royal and Northwest Highway.

The 6,000-square-foot homes on roughly one-acre lots that replaced mid-century ranches since the 1980s rarely have one heater. They commonly have two or three tank units, or a pair of tankless units plus a recirculation loop, serving separate wings, guest houses or pool bathrooms. A repair here often means working out which unit feeds which fixture before touching anything.

Recirculation pumps are the usual hidden fault. A pump that stops running makes the far bathroom wait two minutes for hot water, and the owner assumes the heater is failing. Checking the pump, its timer or aquastat, and the check valve takes a short visit and is often cheaper than assuming a new tank.

The older housing is a different story. Ranch houses from the 1930s through the 1950s, and the large Charles Dilbeck–designed homes from the same period, are still around Lakehurst, Averill Way and the blocks off Royal Lane. Many sit on slab or pier-and-beam, and original gas runs are black iron that has been cut, capped and extended several times.

At replacement time, an old venting arrangement is the usual surprise. A tank moved from the garage during a renovation may end up on a flue that no longer meets draft requirements, and undersized combustion air in a rebuilt utility room is a common finding.

Gas is the default across North Dallas, delivered by Atmos Energy, and electric is delivered by Oncor. Estates with pool houses and guest suites often add electric tanks or heat-pump units where running gas is awkward, and condo buildings along Preston Road and Northwest Highway frequently use central systems.

Dallas Water Utilities supplies the Dallas portions. The Park Cities municipalities are not run by Dallas, though they draw on the same regional supply, so the scale pattern is similar: mineral buildup at around 7 grains per gallon coats elements and settles under gas burners. Large estates with infrequently used guest wings are worth a flush because sediment collects where hot water barely moves.

The October 2019 tornado destroyed Cary Middle School and damaged homes along its path through this part of Dallas, and the February 2021 freeze burst lines in garages and pool equipment rooms across the city. Mature oaks drop limbs onto flues and vents in spring storms, so a heater that smells of gas after a windstorm deserves a quick inspection of the vent cap and draft hood.