Water heater repair in Houston, TX

Attic and garage heaters: the Houston pattern

Most Houston homes sit on concrete slabs, with no basement to hold a water heater. Builders put the tank in the garage in many subdivisions, from Katy to Pearland to Kingwood, but a large share of homes, especially two-story houses and those built from the 1980s onward, have their water heaters in the attic. Older neighborhoods inside the Loop, like the Heights, Montrose and Bellaire, mix garage and utility closet installs with attic tanks added during renovations.

An attic water heater is convenient until it leaks. When a tank fails over a ceiling, water goes through the drywall and into the rooms below. Code requires attic heaters to sit in a drain pan piped to the outside or to a drain, but older pans crack, drain lines clog with debris, and some were never connected at all. Attic work is also slower and harder: plumbers carry tools up a pull-down ladder, often in attic heat that can pass 130°F in summer.

Garage heaters raise their own concerns. Gas tanks in a garage must sit on a stand that raises the burner at least 18 inches off the floor unless the model is flammable-vapor resistant, and many Houston garages also hold a second refrigerator, a freezer and a lot of dust that ends up in the burner's air intake.

Houston water and what it does to a heater

The City of Houston draws mostly surface water from Lake Houston, Lake Conroe and Lake Livingston on the Trinity River, and it has cut back on groundwater pumping to slow ground subsidence. Some suburbs and municipal utility districts still rely more heavily on wells. The result is water that is generally moderately hard, with differences from one utility district to the next.

Warm water from the tap means a Houston heater does not have to work as hard as one in Chicago. But heat speeds up mineral precipitation, and tanks that are set to 140°F or higher, which is common when people try to fix a short hot water supply by turning up the dial, build sediment faster. A yearly flush is worthwhile for most Houston homes, and tankless units usually need descaling about once a year.

Storms, floods and freezes

Houston's weather events show up in water heater calls. Hurricane Harvey in 2017 flooded thousands of garages, and gas water heaters whose burners went underwater had to be replaced, because flooded gas controls are not safe to reuse. If your garage floods, do not relight the heater until a plumber has looked at it.

The February 2021 winter storm was a different kind of test. Homes lost power and heat for days, and pipes froze and burst in attics and exterior walls. Attic water heaters and their supply lines were particularly exposed. Many homes had heaters and lines replaced afterward. If you have an attic heater, insulating the supply lines and knowing where the main shutoff is are the most useful preparation for the next hard freeze.

Power outages during hurricanes also matter for tankless units, which need electricity to run. A standing-pilot gas tank keeps making hot water without power; most tankless units and power-vent tanks do not.

The problems plumbers see most in Houston

• Leaking attic tanks and overflowing or cracked drain pans.
• Sediment rumbling in tanks that have never been flushed.
• Pilot and burner problems from dust and lint in garage installs.
• Tankless scale codes in units not descaled yearly.
• Corroded fittings and connectors in humid garages and attics.
• Short supply in larger homes where a single 40-gallon tank serves a family and a big master tub.

Typical water heater prices in Houston

Houston prices sit near the national average for garage jobs and climb for attic work. Ask whether the quote includes a new drain pan, the permit and removal of the old tank from the attic.

Permits and licensing in Houston

Texas licenses plumbers through the Texas State Board of Plumbing Examiners. You can look up any plumber's license on the board's website, and you should ask for the number before work begins. The City of Houston requires a permit for water heater replacement, as do most surrounding cities such as Pasadena, Sugar Land and Pearland. A licensed plumber normally handles the permit.

Unincorporated areas in Harris County and the many municipal utility districts can have different requirements. A plumber who works your area regularly will know them.

Around the Houston area

Water and housing differ across the metro. Katy, Cypress and The Woodlands are dominated by newer two-story homes, many with attic heaters or tankless units installed by builders. Pearland, League City and Friendswood to the south mix garage and attic installs and sit closer to the coast, where humidity speeds up corrosion on fittings and gas connectors. Sugar Land and Missouri City have large 1980s and 1990s subdivisions whose original heaters are long gone, so many homes there are on their second or third tank.

Inside the Loop, in the Heights, Montrose and Bellaire, older homes have been raised, remodeled or rebuilt, so you can find anything from a 1950s utility closet tank to a new tankless unit on the side of a modern townhouse.

Should an attic heater move?

When an attic tank fails, many Houston homeowners ask whether to move the replacement to the garage or switch to a tankless unit on an outside wall. Moving a heater means rerouting water lines, gas and venting, which adds cost. But it removes the risk of a ceiling flood and makes future service far easier.

A tankless unit mounted outside is a common Houston solution, because the mild climate suits outdoor installs most of the year. It needs freeze protection for the rare hard freeze, and it needs power to run. Get a price for both options before deciding.

Water heater questions from Houston