Know The Warning Signs
A main line leak often hides underground for a while before it becomes obvious. If you're seeing any of these, it's worth having the line checked.
When you call about pressure or a suspected main line leak, we'll ask about your water bill, meter behavior, and any wet spots in the yard. That helps us bring the right equipment. You'll get a clear arrival window.
We use listening equipment to narrow down the leak location along the line before any digging starts. Once we've confirmed the spot, we explain the repair options and cost before opening anything up.
We pressure-test the repaired line, confirm normal water pressure throughout the house, and restore the yard as close to its original condition as we can. We'll tell you if anything else along the line looked worth watching.
Supply Line Specialists
The main water line is the pressurized supply running from the meter to your house, a different system entirely from your sewer line. We locate breaks precisely, repair or replace the damaged section, and restore full pressure.
We locate the break before we dig, so the repair matches the actual problem. If pressure isn't right after we leave, call us and we'll come back and fix it.
You'll get an itemized quote before any digging starts, and we keep you posted if the scope changes. What's on the quote is what shows up on the invoice.
It's a common mix-up, and an understandable one. The main water line and the sewer line both run underground between the street and your house, but they carry water in opposite directions and fail in different ways. A main line problem shows up as low pressure, a rising water bill, or a wet patch in the yard. A sewer problem shows up as slow drains, gurgling, or odor.
Getting the diagnosis right matters because the repair approach is different for each. We ask a few quick questions on the phone, pressure symptoms versus drainage symptoms, to point you toward the right service before a plumber even arrives.
Older San Antonio neighborhoods often still have galvanized or early copper main lines, and shifting clay soil adds stress at joints and fittings over the years. Once a line starts leaking underground, the water usually finds the path of least resistance, which doesn't always match where the wet spot shows up on the surface.
That's why we use acoustic listening equipment to trace the sound of the leak along the pipe's actual path before opening up any ground. It keeps the dig site small and the repair focused on what's actually broken. During a main line visit, we typically check:
Did you know that approximately 9-13% of our service calls are to come out to fix other companies' mistakes?
From Downtown to the Suburbs
Main line material and depth vary across San Antonio depending on when a neighborhood was developed. PlumbSmart has repaired lines under older slab homes downtown and newer construction throughout the surrounding suburbs.
Diane Mcelroy
Recent Google review
I am having a weird issue with intermittent dampness in my garage. Roger spent about 1.5 hours trying to locate the problem. He assured me it was not a plumbing problem and told me not to worry about the service call.
Andrew Schaffrinna
Recent Google review
Joey was extremely knowledgeable and friendly. Excellent service, excellent advice, went above and beyond by providing me with recommendations on how to prevent future issues. Highly recommend.
Kristi Lopez
Recent Google review
So happy with our new system! The team was absolutely fantastic! Thank you!
Svetla McPhie
Recent Google review
PlumbSmart was the only plumbing company that responded the same day to fix a leak. Excellent work and coordination. All over great team.
Plumbing disasters don't wait for business hours. Our expert team is ready to roll at any moment's notice, day or night, to handle your emergencies.
The main water line brings clean, pressurized water from the meter into your house. The sewer line carries wastewater away from your house. They're separate systems that fail differently: a water line break shows up as low pressure or a wet spot, while a sewer issue shows up as slow drains or odor.
We use listening equipment to trace the sound of escaping water along the buried line's path, narrowing down the location before any digging starts. That keeps excavation targeted to where the actual break is instead of trenching the full run from the meter to the house.
Aging galvanized or older copper pipe, corrosion, and shifting clay soil are the most common causes here. San Antonio's soil expands and contracts with moisture changes, which puts stress on buried lines over time, especially at joints and fittings.
Yes, for the portion of the repair itself, since the line has to be depressurized to work on it safely. We plan the shutoff window and let you know roughly how long to expect, and we restore service as soon as the repair and pressure test are complete.
It depends on the pipe's age, material, and how much of the line shows signs of failure. A single break in newer pipe is usually a straightforward spot repair. Older galvanized lines with one failure often have similar wear throughout, which can make full replacement the more practical long-term choice.
Did you know that approximately 9-13% of our service calls are to come out to fix other companies' mistakes?
From the Blog
Practical tips and local insights from the PlumbSmart team.
1233 Safari St, San Antonio, TX 78216
(210) 810-0810Available 24 hours, 7 days a week.
Main water line leaks tend to sneak up on people because they happen underground, away from anything visible. By the time a wet patch shows up in the yard, the leak has usually been running for a while. Catching a rising water bill early, before the yard gets soggy, often means a smaller repair.
We locate the leak with listening equipment first, which keeps the excavation to the actual problem area instead of trenching the full run from the meter to the house. Once we've confirmed the spot, we'll show you what we found before opening anything up.
If the line is old galvanized pipe with one confirmed failure, we'll talk through whether a full replacement makes more sense than a repair, since a line that failed once in old pipe is a reasonable bet to fail again somewhere else down the road.