Plumbers in San Antonio, TX

The hardest water in Texas

San Antonio’s water comes almost entirely out of limestone. The Edwards Aquifer that SAWS pumps from has spent centuries dissolving calcium and magnesium into it, and blending in Canyon Lake and pipeline water does little to change that. At fifteen to twenty grains per gallon, it is about as hard as municipal water gets in a large American city, and it sets the rhythm of plumbing here.

Tank water heaters fill with sediment within a couple of years and start to rumble. Tankless heaters scale inside the exchanger and shut down with error codes. Shower valves stiffen, aerators clog, dishwashers and washing machines wear out early. The practical response is a softener, and San Antonio has more of them per household than almost any city in the country. Our plumbers install, size, repair and replace softeners, flush and descale heaters, and rebuild the fixtures the water has worn.

Inside the loop, under the oaks

The neighborhoods inside Loop 410, from King William and Monte Vista to Beacon Hill, Woodlawn Lake, Jefferson and Highland Park, were built before 1960 with clay-tile or cast iron laterals under yards that have since grown some of the largest live oaks and pecans in the city. The roots have found every joint. A backup that returns a year after the last cleaning is the standard complaint, and a camera inspection is what shows whether the lateral can be lined or needs replacement. Pier-and-beam homes in these areas also carry cast iron drains and sometimes galvanized supply lines under the house.

Limestone north, clay south

The north side, including Stone Oak, Sonterra, Encino Park, Timberwood Park and Alamo Ranch, sits on the Edwards Aquifer recharge zone: limestone with thin soil, stable ground and strict rules about what can be excavated or installed there. Slab leaks from soil movement are rare on that side. South, east and central San Antonio sit on expansive clay, and the 1960s to 1980s slab homes in Harlandale, Highland Hills and the Northeast side see the same slab leaks and offset laterals as Dallas.

Freezes and floods

San Antonio freezes a few nights most winters and every so often for days, as in February 2021. Homes here have supply lines in exterior walls, open crawl spaces under older houses, and tankless heaters mounted outside, and all of them split when a hard freeze arrives. The city also sits in Flash Flood Alley, where the San Antonio River and its creeks rise in hours and older sewer mains surcharge. Our plumbers handle the freeze-night calls and the post-storm sewer inspections that follow.