A homeowner in Prince Frederick called us after discovering water damage in their kitchen ceiling — their fourth pinhole leak in two years. The previous three leaks had been repaired individually by different plumbers, but no one had explained why the leaks kept happening. The homeowner had spent over $3,500 on individual repairs and was now facing water damage remediation on top of another plumbing repair. They wanted to understand the root cause and find a permanent solution.

We tested the water and found a pH of 6.1 — acidic enough to actively corrode copper pipe. We also found iron at 4.2 ppm and hardness at 14 GPG. The combination of acidic pH and moderate iron is particularly corrosive to copper — the iron acts as a catalyst that accelerates the corrosion reaction. We inspected the visible copper supply lines throughout the home and found widespread pitting and thinning of the pipe walls, particularly at elbows and tees where turbulence concentrates the corrosive attack. The home was a 1987 build with original copper supply lines — 38 years of acidic water had taken a significant toll. Individual repairs were no longer a viable strategy; the entire supply system needed to be replaced.

1. 1Tested water: pH 6.1, iron 4.2 ppm, hardness 14 GPG — confirmed acid-driven corrosion
2. 2Inspected all accessible copper supply lines — widespread pitting and wall thinning throughout
3. 3Presented homeowner with options: continued spot repairs vs. full repipe with PEX-A
4. 4Homeowner chose full repipe — more cost-effective than continued repairs and water damage
5. 5Repiped entire home supply system with Uponor AquaPEX (PEX-A) — immune to acidic corrosion
6. 6Replaced all shutoff valves, supply lines to fixtures, and pressure reducing valve
7. 7Installed calcite acid neutralizer on main supply line to protect the new PEX and all appliances
8. 8Patched drywall access points and documented all new pipe routing for homeowner records
9. 9Final pressure test: 80 PSI for 2 hours — no pressure loss

The home now has a complete PEX-A supply system that is immune to acidic corrosion. The acid neutralizer corrects the pH before water enters the distribution system, protecting the water heater, appliances, and fixtures. The homeowner has had no leaks in the four months since the repipe. The total cost of the repipe plus acid neutralizer was less than the projected cost of continued spot repairs and water damage remediation over the next five years.

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