Key points.
The age is read on the nameplate, not from an impression: note it before the failure.
The Code governs the safety valve discharge pipe and its connection: that can be checked in a quote.
Compare what the installation covers, not just the price of the tank.
Describe the existing unit and what you observe
The only reliable figure is the one written on the appliance. Photograph the nameplate: it carries the brand, the model, the capacity and the date. Service lives published online range from 8 to 20 years depending on the page, which means none of them decides for you. The date on the plate, the visible condition of the tank and the repair history do.
Then note what you observe, and since when: lukewarm water, rumbling, rust marks, dampness under the tank, a dripping valve. Water under a water heater does not wait: it is the one symptom that is handled as an emergency.
Do it today, not on the day of the leak. A two-minute record changes the conversation.
References : CMMTQ ↗
Choose the capacity from your habits
Capacity is not chosen “same as before” out of reflex. It follows from your current habits: how many people live in the home, how many showers are taken within the same hour, and whether a bathtub, a dishwasher or a washing machine draw hot water at the same time.
Say what is about to change too: another child, a basement apartment, working from home. An undersized tank shows up every morning; an oversized one costs more to buy and heats water nobody uses.
The number of people
And above all how many shower within the same hour, in the morning.
The appliances
Bathtub, dishwasher, washing machine: what draws hot water at the same time.
What is about to change
A child, an added apartment, a different schedule. Capacity is chosen for the years ahead.
Have the installation spelled out
Replacing a storage water heater is not just swapping an appliance: it must comply with section 2.6.1.7 of chapter III, Plumbing, of the Construction Code. What is governed, and what can be checked in a quote, is the safety valve discharge pipe.
The Régie du bâtiment describes that pipe: it must be sloped downward and indirectly connected, meaning with no direct connection to the drainage system, to a floor drain, a retention pan, the parallel extension of a fixture outlet, or a pan placed under the water heater. If the quote says nothing about any of this, ask.
- Safety valve
- The device that releases pressure. Its discharge pipe is governed by the Code, not just the appliance.
- Indirect connection
- The pipe is not plumbed straight into the drainage system: it discharges to open air over a drain or a pan.
- Retention pan
- The pan placed under the appliance, which catches water and connects indirectly to the drain.
References : CMMTQ ↗ · Régie du bâtiment du Québec ↗
Compare the quotes and keep a record
Two replacement quotes compare on three lines only: the appliance, the work and what is left to you. The rest is decoration. Ask for a line-by-line price, and ask both companies for the same thing.
Settle payment in advance. The Office de la protection du consommateur recommends minimizing or avoiding a deposit with an established contractor, paying as the work progresses, and keeping a final balance of 10 to 15 % until it is finished.
References : CMMTQ ↗ · Office de la protection du consommateur ↗
Reading two replacement quotes on the same basis
| What to compare | What to clarify with the professional |
|---|---|
| Appliance | Brand, model, capacity, and what replaces what |
| Location | Access, space, floor drain or retention pan |
| Installation | Removal of the old unit, fittings, safety valve discharge pipe, testing |
| Price | Broken down by line item, exclusions, payment terms |
Your preparation checklist
Frequently asked questions
- How long does a water heater last?
- Published figures run from 8 to 20 years depending on the source, which means none of them settles it for your unit. What settles it: the date on the nameplate, the visible condition of the tank, and the appearance of dampness or rust.
- How do I find out its age?
- On the nameplate, which carries the brand, the model, the capacity and the date. Photograph it while the appliance still works: on the day of a leak, nobody takes the time to read it.
- What does the Code govern during a replacement?
- The replacement must comply with section 2.6.1.7 of chapter III, Plumbing, of the Construction Code. The Régie du bâtiment describes in particular the safety valve discharge pipe: sloped downward and indirectly connected to a drain, a retention pan or the equivalent. Régie du bâtiment du Québec ↗
- Should I pay a deposit?
- The Office de la protection du consommateur recommends minimizing or avoiding it with an established contractor, and keeping a final balance of 10 to 15 % until the work is finished. Office de la protection du consommateur ↗
Sources and references.
- CMMTQ : Avant de confier vos travaux à un entrepreneur, que devez-vous vérifier? ↗Quebec
- Office de la protection du consommateur : Connaître les modalités de paiement offertes (plombier ou électricien) ↗Quebec
- CMMTQ : PL-18 : remplacement d’un chauffe-eau dans un bâtiment existant ↗Quebec
Conditions and rules may change; consult the relevant organizations for your project. The questions, tables and examples are preparation tools provided by Projet Maison 360. Source titles and links are in French.
