Water drips through a ceiling. When the drywall comes down, the copper pipe behind it is coated green, and there's an old patch in the same ceiling from years ago. Stopping the active leak comes first. In a home on a private well, the follow-up should also ask whether water chemistry contributed to the failure.
A ceiling leak with a history
In a Hudson, MA home on a private well, the homeowners had already pulled down some ceiling material trying to find a drip. They'd narrowed it to a corner where water was visibly dripping, but couldn't tell whether it came from a joint, an elbow or farther up the line. Once the water was shut off at the water heater, the dripping stopped, which pointed to the hot supply line rather than the cold. Working in a tight cavity with limited visibility, we could see the pipe was coated green, a sign of corrosion.
The house had history, too. A large patched section of ceiling dated from before the current owners bought the house nearly twenty years ago. The owners reported that the water had never been tested. The cause of the earlier leak wasn't documented, so we couldn't assume the two failures were connected.
What the treatment equipment told us
The homeowners mentioned an aerosparge unit, installed for radon, that had been bypassed and shut down for years. They also had point-of-use arsenic filters under a couple of sinks. That equipment history didn't establish the water's current chemistry or explain the pipe damage. Green corrosion on the outside of a pipe is a reason to investigate, not proof that acidic water caused an internal failure.
An earlier visit that day had raised similar concerns about acidic well water and repeated pipe repairs. That experience was a reason to ask about testing here, not a diagnosis for this home.
Water testing alongside a leaking pipe repair
After the active leak is isolated, on-site checks such as pH and hardness can help us decide whether fuller water testing belongs alongside the repair. Those results add context; they don't locate every weak section of pipe or prove why this one failed. We don't have test results from this home, so we can't say the water caused this leak.
Inspection of the pipe, its connections, installation and failure location remains part of the diagnosis. If testing supports a treatment discussion, our test-first water treatment service matches the recommendation to that property's results. Replacing one damaged section doesn't establish the condition of all the concealed piping.
The repair itself
Access can be a substantial part of a pipe repair. The plumber identifies the leak location, checks the accessible pipe and connections, and explains what needs to be opened to reach the damaged section. Nearby wiring and other hidden services also matter. Inspection may change the repair scope; one opening can't establish the condition of every pipe behind the walls.
PFAS and other questions about the well
The conversation on this visit also turned to PFAS. An on-site test can't answer that. PFAS needs a sample sent to a certified laboratory, and so do bacteria, arsenic and other health-related questions. The EPA's private-well guidance and its page on PFAS in private wells explain why, and our water testing service shows how field checks and lab analysis fit together. Treatment for any contaminant is chosen from lab results and the exact model's certification for that contaminant.
Do I need a plumber for a pinhole leak, or can I patch it myself?
If you know which valve isolates the affected line or the home's water supply, close it only if it is dry, safely accessible and turns without forcing. Keep clear of hot water, sagging ceilings and any wiring near the leak, and call. Replacing copper supply piping is work for a licensed plumber. A patch over one pinhole doesn't explain why the pipe failed.
Getting the leak and the water checked
Jeneral Plumbing is based in Westford, MA and serves homes across Middlesex & Worcester County. We confirm the address, the work and availability before booking. A regular-hours visit carries an $80 dispatch fee — the cost of the visit, waived when you hire us for the work. When we're already at your home for a visit, the on-site water test is free; we don't make a separate trip for a free test. Call (978) 392-7789 about a recurring leak or green, corroded copper. Our pipe leak repair service explains how we approach the repair.
Written by Jeneral Plumbing.
This article was drafted with AI writing tools and edited before publication. AI tools did not inspect any job or validate technical conclusions.
Last updated .