Adelaide eastern-suburb heritage homes — Norwood, Burnside, Toorak Gardens, Walkerville, Marryatville — typically have plumbing from at least three eras layered together. Original galvanised steel from 1900s-1930s, copper rough-in from 1950s-1970s renovation eras, and PVC or PEX patches added in the last 30 years. Each material fails differently, and a full-replumb decision needs to weigh all three.
Galvanised steel — the original
Galvanised steel pipe was standard in Adelaide residential plumbing from the 1880s through the 1960s. It corrodes from the inside out — internal scaling reduces pressure and water becomes brown or rusty after long sit periods. Failure point is typically 60-80 years from install. By 2026, virtually all original galvanised in heritage homes is at end-of-life.
Lead — the phase-out
Lead pipe was used for water service connections in Adelaide until the 1930s and for some interior runs into the 1950s. SA Water has a long-running program to replace lead service mains; private property lead is the homeowner's responsibility. If you have a heritage home with original service connection, get it tested.
Copper — the workhorse
Copper became standard in Adelaide from the 1950s and is still in widespread use. Failure modes: pinhole leaks from electrolysis where copper meets steel without dielectric union, and stress-cracking at fittings on unprotected runs. Lifespan: 50-70 years.
PVC and PEX — the modern
Modern heritage renovations typically use PEX for hot and cold water and PVC for drainage. Lifespan of modern PEX is rated at 50+ years, and it tolerates Adelaide's hard water far better than copper.
Terracotta sewer drains — the classic Adelaide failure
Original Adelaide sewer connections used vitrified clay (terracotta) pipe. Tree root infiltration through joint gaps is the classic failure — eastern-suburb plane and gum trees are notorious. Modern lining (CIPP — cured-in-place pipe) avoids excavation but is not always feasible. Excavation and replacement to PVC is common in major heritage renovations.
When to replumb a heritage home
- Brown or rusty water on first draw after sit periods (galvanised internal corrosion)
- Pressure noticeably lower at upstairs taps than ground floor
- Repeated pinhole leaks across multiple locations
- Slow-draining sinks across multiple fixtures (likely main-line tree root issue)
- Major renovation work where walls and floors are open anyway — the marginal cost is much lower
