Galvanized supply lines corroding from the inside
Why it happens here
In Valverde the early-1900s working-class houses with 1950s infill run on galvanized steel supply, early copper in places, and the zinc coating is wearing away. As the steel rusts from the inside out, pressure falls and the water discolours, and pinholes open behind walls — the cohort fails together, which is why the diagnosis starts with a pressure test.
Our approach
Pressure and flow are tested at the entry point first, so a mains fault is never mistaken for a house fault. Where the corrosion has run through the house, the plan becomes a repipe — and on the small early-1900s lots along the riverfront, the entry-point reading comes first, because the house and the industrial users beside it share the same ageing mains.