What to check during a plumbing inspection before buying a house?

A plumbing inspection before buying a house in Quebec should cover these essential points:

What a plumbing inspector checks:

• Water entrance: Pressure (should be between 40-60 PSI), pipe type, presence of backflow preventer
• Water heater: Age (10-15 year lifespan), T&P valve, expansion tank, leaks, sediment
• Visible piping: Copper (check for green pitting), PEX (check for leaks at fittings), galvanized (internal rust)
• Toilet: Stability, base leak (wax ring), flushing, age
• Sinks/lavatories: Flow, pressure, drains (speed), leaks under cabinet
• Venting: Presence of revent for each fixture, roof vent unobstructed
• Septic system (if applicable): Date of last pumping, inspection of treatment component

Red flags:

• Galvanized pipes (lifespan exceeded — 40-50 years)
• Rust or mold stains under sinks
• Sewer odors (inadequate venting)
• Fluctuating water pressure

The cost of a plumbing inspection by a CMMTQ professional is about $200 to $400.