Commercial
Pinhole Leak Detection and Repair in the South Bay
Locating and repairing pinhole leaks in copper supply lines for South Bay homes, HOAs, and commercial buildings — with a repipe assessment.
Why pin hole leak
Why Copper Fails This Way in the South Bay
A pinhole leak is copper supply pipe corroding through from the inside out. It usually shows up as a ceiling stain or a damp patch of drywall long after the pipe actually began failing, which is why the repair is rarely just the section you can see.
The South Bay has a specific version of this problem. Much of the housing stock in Torrance, Redondo Beach, and San Pedro was built between the 1950s and 1970s on thin-wall copper, and decades of water chemistry leave that copper pitted from within. Once one pinhole appears in a run, others in the same run are usually not far behind — the pipe has reached the end of its service life rather than suffered a one-off defect.
Finding It Before Opening Walls
We locate the leak before cutting. Pressure testing isolates the affected run, and acoustic and thermal detection narrow the position so access is opened where the leak actually is, not where the stain appeared. On multifamily and commercial buildings this matters more, because exploratory demolition across occupied units quickly costs more than the repair itself.
Once the pipe is exposed we assess the surrounding run, not only the failure point. Cutting out six inches of pitted copper and splicing in new material solves this week's leak and leaves the rest of the run to fail on its own schedule. Where pitting is widespread we say so, and price a partial or full repipe against the spot repair so the decision is an informed one.
Homes, HOAs, and Occupied Buildings
On single-family work the priority is containing damage and restoring service the same day where possible. On HOA and commercial buildings it is coordination — isolating the right riser rather than the whole building, notifying affected units, and scheduling water-off windows tenants can work around. We handle the notification sequence and keep the shutdown as narrow as the plumbing allows.
Why DECOMA
One license, three disciplines, forty years.
Family-run South Bay general contractor since 1978. We design, build, and manage — under one license — so the team you start with is the team that hands you keys and the team that answers the phone when something needs fixing in year ten.
- Years building
- 48+
- Projects delivered
- 3,000+
- Repeat clients
- 300+
- CSLB Class
- A/B
Service areas
Pin hole leak across the South Bay.
Born in Harbor City, working across LA County since 1978. Same crew, same license number, same shop at 25941 Frampton Ave, Harbor City.
Talk to a contractor
Tell us about your project.
One business day for a scope, timeline, and budget range. CSLB #375508 A/B.