Licensed & Insured · CA LIC #982663
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Pacifica, San Francisco, Burlingame, CA · Serving the Bay
PACIFICA, CA • LIC #982663 • 24/7
We answer the phone day, night, weekends, and holidays, with same-day service across the Peninsula.
A water bill that climbs with no change in habits, a meter that keeps turning with every tap closed, a patch of yard that never dries. Each one points to water going somewhere it should not.
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Works Plumbing provides leak detection in Moss Beach, CA for homes on the Montara Water and Sanitary District system. We test first, narrow the leak to a location, and price the repair before anyone opens a wall or a lawn. Schedule a leak detection visit and we will start with the meter.
Key takeaways
Most hidden leaks announce themselves indirectly. Watch for:
One sign can be a quirk. Two together are worth a test.
If you see water surfacing in the street or near the district meter, note where it is. That detail helps us and MWSD sort out whose pipe is involved.
We work from the outside in, splitting the plumbing into sections until the leak has nowhere left to hide.
The exact tools depend on the pipe material, depth, and surface above it. We explain what we used and why on the visit.
Where the leak sits changes the repair and who you call next.
| Location | What you may notice | Who handles it |
|---|---|---|
| Inside the house | Stains, warm floors, sounds in walls | Owner, through a plumber |
| Service line, meter to house | Wet yard, meter moving with the main shutoff closed | Owner, through a private contractor (MWSD Code 3-5.1100(a)) |
| District main or connection | Water in the street, district notices | MWSD |
If our test points to the district side, we tell you so and stop. You do not pay us to repair pipe you do not own.
For an underground break on your side, our water line repair in Moss Beach page covers what comes after the leak is found.
Beyond Seal Cove, two facts shape how we approach a Moss Beach leak.
Housing age. Census estimates put the median year built for Moss Beach homes at 1971. Older supply piping, original shutoffs, and fittings from past remodels are common places for slow leaks to start.
County permits. Moss Beach is unincorporated. Building and plumbing permits come from San Mateo County Planning and Building, not a city hall. If a repair needs a permit, we confirm the requirements with the County before work starts.
In Seal Cove specifically, the County Building Division has been inspecting affected properties. If your home has a County tag, tell us when you call so we can check what work the County allows before we schedule.
Finding the leak is half the job. We at Works Plumbing lay out the repair options before anything is opened:
On ground that has moved before, we talk through how the new section is laid and connected, since a repair that ignores movement may not hold. Larger replacements can use our financing options.
Before we close the opening, we test the repaired section under normal pressure and watch the meter again. A meter that stays still with every fixture off is the result you want to see. If it still moves, there is a second leak, and we keep looking rather than call the job done.
Works Plumbing has been family owned and operated since 2009. We serve Moss Beach and the rest of the Midcoast as part of our San Mateo County service area.
Read more about our general leak detection service, or see all our local work on the Moss Beach plumbing page.
Is the water line from the street to my Moss Beach house my responsibility?
MWSD has told Seal Cove owners that private service pipes and laterals are the owner’s responsibility under District Code Sections 3-5.1100(a) and 5-4.225, and that private contractors handle those repairs. The district maintains its own mains.
Did the 2025 rains cause the Seal Cove pipe breaks?
MWSD reported no new water main leaks in Seal Cove after the March 2025 rains through July 2025. The district tied the breaks to land movement that buckled roads and pulled buried pipes apart.
My house is in Seal Cove and has a County tag. Can you still look for a leak?
Tell us about the tag when you call. The County Building Division may issue yellow or red tags that restrict use of a property, so we check with the County about what work is allowed before we schedule a visit.
Do I need a permit to repair a leak in Moss Beach?
Moss Beach permits come from San Mateo County Planning and Building. We confirm permit requirements with the County before work starts, based on what the repair involves.
Can a leak be on the district side instead of mine?
Yes. If our testing points to the district main or connection, we tell you and you contact MWSD. We only price repairs on the pipe you own.
Why test before digging if I can see a wet spot?
Water travels along a pipe trench and can surface away from the actual break. Testing narrows the location so the opening is as small as possible.
Water that leaves a pipe underground does not stop on its own. Book leak detection in Moss Beach with Works Plumbing, and we will show you where the water is going before we recommend a fix.
Leak detection systems work by monitoring the flow of water through either an ultrasound or a mechanical turbine. Such leak detection systems track the pattern of the water flow by either counting or recording the gallonage passing through the sensor. The presence of moisture is often isolated from other detectors of leaks. If moisture enters the surfaces, a mechanical valve is triggered, which will block water flow when such leak detection systems senses. How do you find an underground pipe leak? Moisture sensing detectors are best suited for point-of-use applications that are under-sink. Leak detection devices all over the house continue to monitor the use of water to prevent potential leakage. At Works Plumbing, we guarantee 100% clients satisfaction for your leak repair.
Every job comes with upfront pricing, licensed and background-checked technicians, and a 100% satisfaction guarantee . No surprises, no pressure, ever.
Snap a photo of the problem before you call, it helps us bring the right parts on the first visit.
See how we handle it:
Prefer to listen? Catch this topic on our homeowner podcast:
Upfront pricing, licensed techs, and a real human on the phone 24/7 across the Peninsula.
A look at real Works jobs around the Peninsula.
Moss Beach has a documented reason for underground leaks. Parts of the Seal Cove neighborhood sit in an active landslide area. The Montara Water and Sanitary District’s Seal Cove resident updates describe land movement that “buckled roads and pulled apart or broke buried pipes.”
The district’s own records point at the ground, not the weather. MWSD reported no new water main leaks in Seal Cove after the March 2025 rains through July 2025. The breaks it had repaired were tied to movement.
That matters for the pipe on your side of the connection. A buried joint that is pulled apart does not drip onto a ceiling. It leaks into the soil around it. Water can run there unnoticed until a bill or a wet spot gives it away. Ground that is still shifting can also open a joint that a past repair had closed.
MWSD has told Seal Cove owners that private service pipes and laterals are their responsibility under District Code Sections 3-5.1100(a) and 5-4.225, and to hire private contractors for those repairs.
So on a Moss Beach call, we do not assume the leak is inside the house. We test the service line from the district connection to the house as its own section. Then we decide where to look, and only then where to dig.
We also serve these neighboring Peninsula towns.
We’ve earned our reputation one happy homeowner at a time.
“Thank you again for another job well done, and thank you for responding right away. I will continue to recommend Works Plumbing because they respond right away and get the job done efficiently.”
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