Plumbers in Dallas, TX

The ground under Dallas

The Blackland Prairie clay beneath Dallas is famous among engineers for how much it moves. It takes on water in a wet spring and swells, then gives it up in August and shrinks, and a house on a slab rides that cycle every year. The copper supply lines cast beneath a 1960s home in Lake Highlands or Preston Hollow have been flexed by that movement for sixty years. When one finally opens, the water runs under the slab, the floor warms, the bill jumps, and a Dallas plumber gets a call that is about as routine here as a clogged drain elsewhere.

The same movement is why Dallas has one of the busiest foundation-repair markets in the country, and foundation repair and plumbing are tangled together. Lifting a slab onto piers pulls on every pipe attached to it. Our plumbers run hydrostatic tests on the drains and pressure tests on the supply lines before and after foundation work, because a joint that opens during a lift is far cheaper to fix that week than a year later.

Older neighborhoods, older pipes

East Dallas and Oak Cliff hold the city’s oldest housing. Lakewood, the M Streets, Munger Place, Swiss Avenue, Kessler Park and Winnetka Heights are pier-and-beam homes from the 1920s through 1940s with cast iron drains under the house and clay-tile laterals running to the street under live oaks and cedar elms planted when the houses were new. Roots have had seventy years to find the joints, and clay soil has offset them. A backup that comes back a year after the last cleaning is the classic result, and a camera inspection is the way to see how much of the line is still worth keeping.

North of Mockingbird Lane and especially north of LBJ Freeway, the housing is slab construction from the 1950s onward, and the problems shift from cast iron and roots to copper under the slab and aging water heaters.

A colder winter than the rest of Texas

Dallas freezes more often and harder than Houston, Austin or San Antonio. Most winters bring several nights below freezing and some bring days of ice. Houses here are still built for the summer, with supply lines in attics and exterior walls, hose bibs without frost protection, and tankless heaters on outside walls. The February 2021 storm showed what that combination does at scale, and every hard freeze since has produced a smaller wave of burst pipes across the city. Insulation, hose bib covers and a dripping faucet on a freeze night are cheap. Our plumbers can tell you which lines in your house are the exposed ones.

Water from the lakes

Dallas draws its water from a chain of North Texas reservoirs, and it arrives moderately hard to hard. That is gentler than San Antonio’s aquifer water but hard enough to fill a water heater with sediment in a few years and scale a tankless exchanger. Annual flushing keeps most Dallas heaters healthy; a softener is a reasonable upgrade and close to essential in some of the suburbs on harder supplies.