Galvanized supply lines corroding from the inside
Why it happens here
In Montbello the 1960s-70s soap-box ranches supply is galvanized steel, early copper in places, and the zinc coating is wearing away. Steel rusts from the inside out, pressure drops, water discolours and pinhole leaks start behind walls — the cohort fails together, which is why the diagnosis is a pressure test.
Our approach
We pressure-test the system in Montbello, where a 1960s–70s soap-box ranch may have galvanized supply in the original house and copper or PVC in a later multi-level addition, so the test is read room by room rather than assumed house-wide. Where corrosion is isolated, we replace that section; where it runs through the house, we plan a phased repipe and show the pressure readings before and after.