Leak Detection & Repair in San Antonio, TX
A hidden leak bleeds pressure away before water ever reaches your faucets — and it can run up your water bill while it does it. We find the leak, then fix it.
How a Leak Causes Low Water Pressure
Water pressure is the force pushing water through your pipes. A leak is an open door in the system: water escapes through it instead of reaching your fixtures, so pressure at the faucet drops. A large leak drops pressure suddenly and obviously. A small, hidden leak drops it slowly, and the first sign is often a water bill that climbs for no clear reason.
Leaks hide in supply lines under floors, inside walls, and in the line from the meter to the house. San Antonio's soil moves with wet and dry seasons, which stresses buried lines, and older pipe materials fail more often. Finding the leak is the hard part; fixing it is usually straightforward once it is found. That is why detection comes first in our local water pressure repair work — digging without knowing where the leak is costs more and fixes less.
Signs of a Hidden Leak
- Water pressure has dropped, and your SAWS water bill has gone up.
- You hear running water when every faucet and appliance is off.
- Damp spots, warping, or discoloration on floors, walls, or ceilings.
- A patch of yard that stays wet or grows faster than the rest.
- The water meter moves when no water is being used in the house.
- Warm spots on a floor, which can point to a leak in a hot-water line.
If water is leaking heavily, turn off the main shutoff valve first, then call us at (726) 465-7927.
How Leak Detection Works
- We confirm the leak. A meter check and pressure readings show whether water is escaping somewhere in the system, and whether the leak is on the hot or cold side.
- We narrow the area. Readings at different points, and listening for the sound of escaping water, narrow the search to one section of pipe.
- We locate the leak. The leak is pinpointed as closely as possible before any floor or wall is opened, so the repair opening stays small.
- We repair the pipe. The damaged section is cut out and replaced, and pressure is tested again across the home.
Some leaks are in lines that are badly corroded overall. When that is the case, replacing one section may only move the problem to the next weak spot, and we will tell you if whole-house repiping is the better answer for your home.
Related Services
A leak is often found during water pressure testing and diagnosis, when readings show pressure being lost between the main and the fixtures. If low pressure turns out not to be a leak, the cause is usually a failed pressure regulator, scale that needs pipe descaling, or old pipe that needs repiping. Hidden leaks show up most in older areas such as Alamo Heights and Monte Vista, where old supply lines fail more often.
Call San Antonio Water Pressure Pros
Tell us what your water pressure is doing, and we will talk through what happens next and set a time to come to your home.
14570 Calaveras Creek, San Antonio, TX 78223
Frequently Asked Questions
How can I tell if I have a leak or just low pressure?
Check your water meter: turn off every faucet and appliance, then watch the meter. If it keeps moving, water is escaping somewhere. A rising water bill alongside falling pressure also points to a leak. Testing confirms it.
Can a small leak really lower water pressure?
Yes. Even a small leak lets pressure escape continuously, and the effect grows as the leak grows. A leak also wastes water every hour it runs, which is why a rising bill is one of the best early warnings.
Will you have to tear up my floor to find a leak?
Not to find it. Detection narrows the leak down before anything is opened, so the repair opening is kept small. Where the leak is, and how the pipe runs, decides how much has to be opened to reach it.