Water utility and building services term for discolored water full of suspended iron oxides from corroding cast iron, ductile iron or steel pipe. It shows up after flow reversals, hydrant flushing or pressure surges disturb tuberculated mains, and in hot water systems with failing linings. It is mostly an aesthetic complaint, staining laundry and fixtures, but it signals ongoing metal loss in the network.
Third red water call on Elm Street this month, schedule a directional flush and pull a coupon from that main.
Also heard as
- rusty water
- discolored water
Related terms
Tuberculation
Growth of knob-like mounds of rust and deposits on the inside of iron and steel water pipes.
MIC
Microbiologically influenced corrosion: corrosion started or sped up by bacteria and other microbes.
Corrosion inhibitor
Chemical added in small doses to a fluid to slow corrosion of the metal it touches.
Dealloying
Selective leaching of one element from an alloy, leaving a weak, porous remnant that still looks intact.