Leak Detection & Repair in San Francisco, CA | Emergency Leak Repair

Ever feel like your water bill is accusing you of hosting a swimming pool you don’t have? Water is flowing somewhere, but where? Is it under the foundation, behind the drywall, or running straight into the ground? The leaks you don’t see are often the most expensive ones. Water creeping behind walls, soaking into floors, or pooling under concrete slabs can cause structural damage, mold growth, and repair bills you don’t want.

For homeowners in San Francisco, you need someone who doesn’t just guess but finds the exact source and resolves the issue before it gets worse. Since 2011, we’ve been trusted for water leak repair services that don’t just patch up leaks but seal them off completely. As a 5-star rated company, we’ve worked on homes featured in the San Francisco Decorator Showcase House, and we’re proud members of the San Francisco Plumbing, Heating, Cooling Contractors Association (SFPHCC). We also offer a 1-year workmanship guarantee, financing options, and rebate program support. Call 415-751-1933 or book an appointment online today to stop leaks before they compound your water bills.

Industry-Grade Tools We Use for Leak Detection

Acoustic Leak Detectors

Acoustic leak detectors amplify the sound of water escaping through cracks or loose pipe connections, even if it’s buried underground or behind walls. Our leak detection San Francisco services use these devices to track down even the most elusive leaks.

Thermal Imaging Cameras

Another piece of equipment our plumbers use is thermal imaging cameras that can detect leaks hidden behind walls, floors, or ceilings. By identifying changes in temperature caused by escaping water, we can find problem areas without cutting into your home.

Moisture Meters

To assess how far water damage has spread, we use moisture meters. These devices detect water buildup in drywall, wood, and flooring, giving us accurate information about the extent of the leak.

Video Pipe Inspection Cameras

For leaks deep inside your plumbing system, we rely on video pipe inspection cameras. These tools let us see inside your pipes, locating cracks, corrosion, or blockages causing the issue. It’s one of the go-to devices we use for our San Francisco leak detection service.

Pressure Testing Equipment

By monitoring for abnormal pressure drops, we can find weak spots or hidden leaks and repair them quickly.

Water Leak Detection Services Offered to San Francisco Residents

Hidden Pipe Leak Detection

You might notice a damp patch on the wall or hear a faint dripping sound, but figuring out where the water is coming from? That’s another story. Using acoustic tools and thermal imaging, we locate hidden pipe leaks without unnecessary damage to your home.

Underground Leak Detection

Leaks in underground pipes are a challenge most homeowners can’t handle on their own. They can lead to soggy yards, foundation damage, or skyrocketing water bills. We use advanced video pipe inspection and pressure testing to find the exact location of the problem, even when it’s buried under driveways or landscaping.

Slab Leak Detection

A slab leak is a potential threat to your home’s foundation. These leaks, buried beneath concrete, often cause rising water bills, warm spots on the floor, or cracks in the foundation. With tools like moisture meters and non-invasive imaging, we can find the leak and get straight to work on solutions.

Water Heater and Appliance Leak Detection

We inspect connections, valves, and internal components to find the source of the leak, fixing it before it leads to mold or water damage. Whether it’s your water heater, dishwasher, or washing machine, we repair or replace components to get your appliance functioning properly again.

Client Testimonials

- Anthony Leon

"Flowmasters plumbers repaired a water pipe leak from the mainline. They did a fantastic job, and it was not a simple job. They were able to diagnose and repair the issue the same day I called so we didn’t have to be without water too long. Workmanship was great. I would highly recommend them!"

- Hazel Kawaja

"Carlos is a wonderful young man. He did his repairs efficiently and checked and rechecked to make sure everything was working before he left!"

- Clark Downer

"Juan was fast, courteous, professional, and he solved our leak!"

- Allan Evans

" Communication was timely, professional and transparent. Connor and Gustavo were exceptionally friendly and took the time to explain things and properly diagnose my issue. Prices were fair (for SF). I've had bad experiences with other plumbers in the past, so this was surprisingly better."

- Matt Conte

"Juan quickly diagnosed our plumbing issue, walked me through the diagnosis, suggested options and ultimately completed the work extremely efficiently, with a high degree of professionalism. Would highly recommend Juan and Flow Masters for any work."

plumbers repairing a copper pipe using ProPress machine

Types of Repairs We Offer to Fix Water Leaks

Pipe Repair and Replacement

If a pipe is cracked, corroded, or outright broken, we assess the damage and either repair the leak on the spot or replace the entire section with high-quality materials.

Slab Leak Repairs

We find these leaks using non-invasive tools like thermal imaging and moisture meters to avoid unnecessary excavation. Once found, we repair or reroute the affected pipe to stop further water damage and protect your home’s foundation.

Faucet and Fixture Repairs

Our leak repair San Francisco services also cover bathroom sinks, kitchen faucets, and more! We repair or replace worn-out components like washers, cartridges, and seals to stop the drip for good.

Water Heater Leak Repairs

We inspect your water heater unit to find the source of the leak, whether it’s a broken valve, corroded tank, or loose connection. Then, we make the necessary repairs or recommend a replacement if needed, so you can have consistent hot water again.

Joint Sealing and Pipe Relining

We seal leaks at pipe joints using durable materials that stop water from escaping. For old pipes, we use relining techniques to reinforce them from the inside and prolong their lifespan without a full replacement.

Flow Masters Plumbing一The Name San Francisco Trusts for Leak Detection & Repair

It’s easy to dismiss a small drip or damp spot as “no big deal.” But those little leaks can cause big problems if you continue to ignore them. They don’t fix themselves, and waiting only gives them more time to grow into something worse. But there’s a way to stop them in their tracks before they take over.

Since 2011, Flow Masters Plumbing has been sealing leaks and repairing holes where water escapes. As certified Hazard Recognition Specialists, you’re guaranteed service that won’t leave even a needle-sized hole to chance. Call us today at 415-751-1933 or book an appointment online to stop those leaks before they cause you any more trouble with our reliable plumbing services.