What Is Galvanized Pipe?
Galvanized Pipe is a steel or iron pipe coated with zinc to slow corrosion. The coating protects the outer surface, while the metal body carries water through a building. Galvanized pipe was common in older water supply systems, but rust can narrow the passage and reduce water flow over time.
Quick Facts About Galvanized Pipe
Category
Metal water supply pipe
Used for
Building water lines
Common confusion
Zinc-coated pipe versus lead pipe
Also called
Galvanized Steel Pipe, Galvanized iron pipe
Often discussed with
Whole House Repiping, Pipe Repair
Key Takeaways About Galvanized Pipe
- Zinc coats the outside of the steel or iron pipe.
- Rust inside the pipe can reduce water flow.
- Galvanized pipe is not the same as copper or plastic pipe.
How Galvanized Pipe Works
Galvanized Pipe carries water through a hollow metal tube. A zinc coating covers the outside and slows corrosion on exposed steel or iron. The pipe usually connects through threaded fittings.
Related glossary terms: Pressure Test, Water Pressure, Water Shutoff Valve.
Water moves through the inner opening, called the bore. Rust can build on that inner surface, so the opening may become smaller over time. A plumber checks visible pipe, fittings, water flow, and signs of leaks during an assessment.
How It Fits Into Repiping
During whole house repiping, the existing layout helps guide the replacement plan. Galvanized sections may connect to newer materials through approved transition fittings. The condition of nearby valves and connections also affects the work.
Expert Note
When we inspect galvanized pipe, we check exposed sections, threaded joints, valves, and signs of rust. We also consider water flow and the condition of connected materials. For whole house repiping, our team maps the existing lines before planning replacement sections.
Galvanized Pipe in Practice: A Real-World Example
A Kent home may have galvanized pipe feeding several fixtures from one main line. During whole house repiping, the replacement plan can account for restricted sections, worn threads, and the route of each water line.
Related Services
Related Terms
Pressure Test
A Pressure Test is a plumbing check that applies controlled air or water pressure to a…
Water Pressure
Water Pressure is the force that moves water through supply pipes, valves, and fixtures. The force…
Water Shutoff Valve
A Water Shutoff Valve is a plumbing control that stops water flow through a supply pipe…
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