Plumbing notes · before you sign

Plumbing to look over before buying an older Oakville house

Older Oakville houses offer character, mature trees and solid bones, but their plumbing has often been updated piecemeal. A focused look before purchase helps you budget for what comes next.

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A coiled purple cord with small white dots — From the almanac guide on buying an older home plumbing checklist.

What to examine

Service material where it enters
House valve type and condition
Visible supply: copper, galvanized or PEX
Drains: cast iron, ABS or clay
Heater age and whether it is rented
Sump pump and backwater valve

Money well spent

Scoping the lateral is among the most valuable checks, especially under big trees. It shows roots, breaks and sags no general inspection can see.

Questions for the sellers

Ask about past backups, flooding, renovations and heater rentals.

One more thing

Look under every sink for signs of past leaks: water stains, warped cabinet floors or new patches. Turn on every tap and flush every toilet, watching for slow drains, weak pressure or noisy pipes.

In the basement, look at the floor drain and any visible drain lines. Rust stains on cast iron, green stains on copper or white crust at joints are all signs of slow leaks or corrosion.

Ask whether the house has a backwater valve, sump pump or other flood protection, and whether the lower level has ever been wet. Sellers are usually required to disclose known issues, but asking directly helps.

If something worries you, a plumber’s visit before the conditions on your offer expire can put a rough figure on it, far better than discovering the problem after closing.