Check the licence first
Plumbing is a compulsory trade in Ontario. Anyone working on your home should hold a valid Certificate of Qualification (306A) or be an apprentice working under someone who does. Asking for the licence number is normal and a reputable local plumber will give it without hesitation.
Common issues in St. Thomas homes
Older neighbourhoods around Talbot Street and the downtown core still have galvanized or clay lateral lines, so recurring drain backups are often a line issue rather than a clog. A camera inspection usually costs less than repeated snaking.
Sump pump failures and backwater valve questions come up every spring. If your basement has ever taken water, ask about a battery backup pump before the next heavy thaw rather than during it.
Emergency versus scheduled work
Burst pipes, sewage backups and no-water situations are genuine emergencies and carry after-hours rates. Dripping taps, slow drains and water heater replacement are almost always cheaper booked during regular hours.
Most St. Thomas homeowners get the best results by shortlisting two or three local businesses, comparing written quotes, and confirming licensing and insurance before any work starts.