Galvanized supply lines corroding from the inside
Why it happens here
Mar Lee's 1950s ranches used galvanized steel supply lines, with early copper in places — and because the whole neighborhood was built out at once, the zinc coating is wearing away on the same schedule everywhere. Pressure drops, water discolours, and pinhole leaks start behind walls, house after house.
Our approach
We pressure-test the system in Mar Lee, where the plainest 1950s cohort in Denver makes the reading easy to interpret: house-wide loss on a ranch of this age is the galvanized supply closing, and the test shows how far through the house it has gone. 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.