Water heater repair in McKinney, TX

NTMWD lake water in McKinney homes

McKinney does not treat its own drinking water. Back in 1951 McKinney joined Plano, Garland and several other towns in creating the North Texas Municipal Water District, and today that district pulls raw water from Lavon Lake just southeast of town and blends in supply from Lake Texoma, Jim Chapman Lake and the newer Bois d'Arc Lake in Fannin County. Most of that water is treated at NTMWD's treatment campus in Wylie, with Bois d'Arc water handled at the Leonard plant, before it is pumped through district transmission lines into McKinney's own storage tanks and mains.

The blend matters for a water heater. Texoma water carries more dissolved salts than the other lakes, and the share coming from each reservoir shifts with drought and lake levels, so the mineral content at a tap in Tucker Hill can drift a bit from one summer to the next. In practice the water is moderately hard. It leaves a pale, sandy layer on the bottom of gas tanks and a thin scale on electric elements, slower than the groundwater cities of West Texas but faster than many people assume.

Each spring the district runs a temporary chlorine maintenance period, trading chloramine for free chlorine across a stretch of weeks so the pipes get a scrubbing. Some homeowners notice a stronger pool smell at the tap during that stretch. Your heater is unaffected, though the smell makes a handy cue that the annual drain is due.

From the historic square to Craig Ranch

The neighborhoods ringing the downtown square, including the Historic District along Tucker, Benge and Church streets, hold Victorian houses, Craftsman bungalows and modest frame cottages, many on pier-and-beam foundations. In those homes the tank often sits in a hall closet, a converted back porch or a detached garage out by the alley, and some still rely on venting that was laid out for a much older heater.

Most of McKinney, though, was built after 1990. Eldorado, Stonebridge Ranch, Craig Ranch, Adriatica, Trinity Falls and the subdivisions spreading north along US 75 and west toward Custer Road are full of two-story brick homes on slabs. Builders here routinely placed one or two 50-gallon gas tanks in the attic above the garage or over a secondary bedroom, with a pan underneath and a drain line run to the eaves. Larger homes sometimes have one attic heater for the master suite and a second for the rest of the house.

Townhomes near the square and around Craig Ranch's town center often use tankless gas units hung on an outside wall or tucked into the garage, a choice that freed up interior space but brings its own maintenance needs on lake water with some hardness.

Collin County hail, heat and the occasional freeze

North of Dallas, spring storms bring some of the largest hail in the country, and McKinney roofs are replaced on a regular cycle. Every reroof is a chance for a crew to bump, crush or leave off the vent cap on a water heater flue. A dented B-vent cap or a pipe pulled apart in the attic can send exhaust back toward the burner, and the first sign is often a scorched draft hood or a pilot that will not stay lit.

Summer works on attic tanks from the other direction. By July an unconditioned McKinney attic can be well above 120 degrees, which bakes the plastic pan, dries out rubber washers and makes the relief valve weep more often. A pan that has cracked from years of heat stops being protection and starts being a false sense of security.

Winter is usually mild, yet hard freezes still arrive every few years, and the February 2021 storm froze attic supply lines and tankless units all over the city. Lines running through attic space over the garage are the most exposed, and a split copper fitting there can soak a ceiling before anyone notices.

The problems plumbers see most in McKinney

• Leaking attic tanks in Stonebridge Ranch and Eldorado homes built in the 1990s that are still on their first or second heater.
• Brittle or cracked drain pans under attic units that have sat through twenty Texas summers.
• Vent caps damaged during reroofs after Collin County hailstorms.
• Weeping relief valves on attic heaters when tank temperatures and attic heat combine.
• Scale-clogged tankless units in townhomes where nobody has run a descaling flush.
• Old closet venting in Historic District cottages that no longer fits a modern tank.

Typical water heater prices in McKinney

McKinney labor runs close to the rest of the northern Dallas suburbs. The attic premium comes from hauling a full-size tank up a pull-down ladder, replacing the pan and drain, and bringing the vent and gas connection up to current code while the crew is there.

Permits and Texas plumbing licenses

Replacing a water heater inside McKinney city limits requires a permit from the City of McKinney's Building Inspections department, followed by an inspection that covers the gas line, the flue, where the relief valve drains and, above a ceiling, the pan and its drain. Homes in unincorporated Collin County or in the city's extraterritorial jurisdiction may fall under county rules instead, so confirm the address before work begins.

Plumbing licenses in Texas come from the state's Board of Plumbing Examiners (TSBPE), and every McKinney job needs one. A legitimate McKinney company carries a master plumber on its license and will put that number on its truck, its estimate and its invoice, where you can match it against the board's online search.

Attic heaters: what to check before one fails

If your heater lives above the ceiling, take a flashlight up once a year. Look for rust streaks down the side of the tank, a damp or stained pan, a drain line that has come loose from the pan fitting and a relief valve pipe that actually runs outside. Make sure the attic walkway to the heater is clear, because a plumber who has to crawl over insulation to reach it will charge for the time.

Many McKinney homeowners with a tank that is ten years old or more choose to replace it on their own schedule instead of waiting for a leak into a bedroom ceiling. Others move the heater down to the garage during replacement when there is room, or trade the tank for a wall-hung tankless heater outdoors, which takes the risk out of the attic altogether.

Sizing for big families and big tubs

Newer McKinney homes often have soaking tubs, multiple showerheads and four or more bathrooms. A single 50-gallon tank can struggle when everyone gets ready at once, especially in winter when lake water arrives colder. Two tanks, a 75-gallon high-recovery model or a whole-house tankless unit are the common answers, and the right one depends on the gas line size and where the bathrooms sit relative to the heater.

Atmos Energy supplies natural gas across McKinney, and its meters and service lines on older streets near downtown were not always sized for a large tankless heater. Electricity is delivered over Oncor's lines and sold by retail providers, which matters if you are comparing a heat pump water heater against gas.

Around McKinney

Neighbors to the south and west handle things their own way. Allen and Fairview sit just south, Prosper and Celina are to the northwest, and Melissa, Anna and Princeton lie north and east along US 75 and US 380. Each runs its own building inspections office, and their water comes through different contracts and member arrangements, so hardness and permit fees will not match McKinney exactly.

Water heater questions from McKinney