Plumbing in San Antonio is hard water every day and heavy rain on the days that go wrong. Mineral packs water heaters, fill valves, and aerators until a fixture dribbles and the tank rumbles. Slab leaks still happen and show up as a warm stripe or the sound of water with every faucet off. A cloudburst surcharges older laterals and low floor drains, and a hail-clogged gutter dumps into the wall. Freeze bursts are not the lead. Scale, slab, and storm water are.
Start with the symptom you can point at. White crust on every aerator and a heater that no longer keeps up is mineral, and the visit should say whether the tank is worth flushing or is finished. A warm spot in the floor is a leak hunt, not a new floor. Sewage in a shower while the street is running is a surcharge. Stop using the drains. Do not treat that backup as a scale problem or as a roof leak that somehow chose the tub.
Rain and hail reach the plumbing at the edges. Gutters full of broken tile and leaves overflow into stucco and down inside walls, which looks like a pipe break and is not. Say if the stain appeared only in the downpour and sits on an outside wall under a valley. Roof drains and patio area drains that cannot take the volume will pond against the house. That is worth a plumbing look at the drain, and a roof look at the tile, and you should say both.
Older houses near the center mix cast iron, galvanized leftovers, and later repairs. Roots from live oaks find the lateral. A single slow lavatory is often local. Several slow fixtures during a storm point at the building drain. Garage or closet heaters sit in the heat and scale up faster than people expect. Say where the tank is and whether it has leaked at the pan.
Have the address and one description: scaled heater, slab leak, sewer backup in the rain, or a wall stain from an overflowing gutter. Say slab or pier and beam. Ask the visit to find the source before the floor or the yard is opened wide. Call the number on this page.