DIY makes sense for simple jobs like clearing a sink trap, replacing a showerhead or fixing a running toilet. Call a plumber for anything involving gas, the main water line, moving drains, water heaters, hidden leaks or work that needs a permit. A failed DIY repair often costs more than hiring a plumber from the start.
- Plumbing jobs you can usually do yourself
- Jobs that need a licensed plumber
- Cost comparison: DIY vs. plumber
- The hidden cost of DIY mistakes
YouTube makes every repair look easy. Some plumbing jobs really are simple, and doing them yourself saves money. Others look simple but can flood a basement, fail an inspection or void your insurance. This guide compares DIY and professional plumbing, job by job.
Plumbing jobs you can usually do yourself
- Clearing a clogged sink trap (P-trap);
- Replacing a showerhead or faucet aerator;
- Fixing a running toilet (flapper or fill valve);
- Replacing a toilet seat;
- Using a plunger or hand auger on a simple clog;
- Insulating exposed pipes before winter.
Jobs that need a licensed plumber
- Anything involving gas lines or gas water heaters;
- Replacing or installing a water heater;
- Moving or adding drains, toilets or showers;
- Leaks inside walls, ceilings or floors;
- Main water line or sewer line problems;
- Installing a backwater valve or sump pump;
- Any work that requires a municipal permit.
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Get my free quotes →Cost comparison: DIY vs. plumber
| Job | DIY | Plumber |
|---|---|---|
| Running toilet | Low: a part and an hour | Service call + part |
| Faucet replacement | Faucet + tools, moderate skill | Flat rate + faucet |
| Water heater | Not recommended: permits, venting, gas or electrical risks | Flat rate + unit + permit |
| Hidden leak | Not recommended: risk of water damage | Hourly + parts + finish work |
| Moving a drain | Not recommended: permit and code rules | Project quote |
The hidden cost of DIY mistakes
A loose fitting that drips inside a wall for months can cause mould and rot. Unpermitted plumbing can show up at a home inspection when you sell. And some home insurance policies may refuse claims linked to work that didn’t follow code. When in doubt, compare a few professional quotes before deciding: you may find the gap is smaller than you think.
Frequently asked questions
Which plumbing jobs can I do myself?
Simple tasks like clearing a sink trap, fixing a running toilet, replacing a showerhead or insulating exposed pipes.
When should I call a plumber instead of DIY?
For gas, water heaters, hidden leaks, moving drains, main lines and any work that needs a permit.
Can DIY plumbing affect my insurance?
It can. Some insurers may refuse claims linked to work that didn’t follow code or lacked a required permit.
Is DIY always cheaper?
Not always. A failed repair or water damage can cost much more than hiring a plumber from the start.
Get quotes for your project
Compare up to 4 plumber quotes for free
Describe your job in 2 minutes. Licensed contractors from Montreal and nearby contact you with their quotes. Free, no obligation.
Get my free quotes →Estimations.pro is a free matching service for homeowners in Montreal and nearby, and does not perform the work. Prices vary by contractor, job and season: the only reliable number is a written quote for your job.
