Buying a water heater is one of the more consequential plumbing decisions a homeowner makes — the unit you pick determines your hot-water reliability for the next 10–20 years and a meaningful chunk of your energy bill across that span. The marketing material from manufacturers makes the choice look simple. It's not. Here's the honest guide we'd give a family member shopping for a water heater in the Lower Mainland.
The four real questions
Before you compare brands or capacities, answer four questions in order:
- Gas or electric? (Determined by your existing connection, not preference)
- Tank or tankless? (Determined by household size, hot-water habits, and how long you plan to stay)
- Capacity / flow rate? (Determined by simultaneous-use peak demand)
- Brand and warranty? (Last to decide, not first)
Gas vs electric — what your house already has matters
If your existing water heater is gas, your replacement should almost certainly be gas too. The gas line, venting, and combustion air provisions are already in place. Switching to electric requires a high-amperage circuit (most electric tanks need a dedicated 30-amp 240V circuit; some larger units need 40-amp) and an electrical panel that has room to add it. Many older Surrey, Vancouver, and Burnaby panels do not — adding a tankless electric usually triggers a panel upgrade too.
If your existing water heater is electric, gas is an option but only if you have a gas line nearby. Running new gas from the meter to a water-heater location can be significant work; permitting and BC-licensed gas fitting add cost. We diagnose this on a free on-site assessment — we'll tell you straight whether switching makes economic sense in your specific home.
Operating-cost rule of thumb in BC
Natural gas water heating in BC is currently cheaper to operate than electric in most cases — but the gap has narrowed as electric rates have stayed flat while gas prices rise. For a typical family of four, expect gas to run $25–40 per month and electric resistance to run $50–80 per month at current rates. Heat-pump electric water heaters are an emerging exception — they cut electric operating cost roughly in half but cost more to buy and are sensitive to install location (need warm air to extract heat from).
Tank vs tankless — the real trade-offs
Marketing makes this sound like an easy 'tankless is better' answer. It's actually a four-factor decision.
Tank advantages
- Lower upfront cost (a quality gas tank runs less than half what a comparable tankless install costs)
- Simpler install — fits where the old one was, same fuel line, same venting
- Higher peak flow — a 50-gallon tank can deliver 80+ gallons of hot water in the first hour before recovery becomes a bottleneck
- Easier repair — common parts (element, thermostat, anode, T&P valve) are universal and inexpensive
- 8–12 year service life typical
Tankless advantages
- Endless hot water (will run for hours straight without running out)
- Smaller footprint — wall-mounted, frees up a closet or part of a garage
- Lower standby losses (no tank constantly keeping 50 gallons hot)
- Longer service life — 18–20 years typical with annual descaling
- Better for irregular households (vacation homes, AirBnBs) where a tank's standby losses are wasted
Tankless caveats most installers don't mention
- Higher upfront cost, often 2.5–3× a comparable tank install
- Gas-line sizing matters — most tankless need 3/4 inch supply where many BC homes have 1/2 inch; upsize is often required
- Venting is different — direct-vent through an exterior wall, not a standard B-vent up through the roof; placement constraints are real
- Hard-water buildup is a real ongoing maintenance issue in some Lower Mainland areas — needs annual descaling (~$200/year)
- Cold-water sandwich effect on short draws (turn hot off, then back on quickly — second burst is briefly cold)
- If gas goes out (rare but happens), you lose hot water immediately; no tank reserve
Capacity sizing — get this right or regret it
Wrong-sized water heaters are the most common buyer's-regret call we get. Two principles:
Tank capacity
First-hour rating matters more than gallon size. A 40-gallon high-recovery gas tank can outperform a 50-gallon electric in real-world morning-rush conditions. For sizing rules of thumb in the Lower Mainland:
- 1–2 person household: 40-gallon tank (gas) or 50-gallon (electric)
- 3–4 person household: 50-gallon tank (gas) or 65-gallon (electric)
- 5+ person household: 65–75 gallon tank, or pair of 50s, or consider tankless
Tankless flow rate
Tankless is sized by GPM (gallons per minute) at the temperature rise your incoming water requires. In Lower Mainland (cold incoming water ~7°C in winter, hot delivered ~50°C), the temperature rise is ~43°C — at the high end of the manufacturer's spec sheets. A 'whole-house' 9 GPM unit on paper may only deliver 5–6 GPM in our winter conditions. We size for peak simultaneous use:
- 1 shower + 1 sink = ~3.5 GPM
- 2 showers running simultaneously = ~5 GPM
- 2 showers + dishwasher = ~6.5 GPM
Brands we install most often, and why
Mr. Plunger services and installs Rheem, Bradford White, Navien, AO Smith, Giant, John Wood, and Rinnai. Here's the honest take on each:
- Rheem — best balance of warranty, parts availability, and quality across both tank and tankless. Our default recommendation for most BC homes.
- Bradford White — installer-only brand (not sold direct to consumers), excellent reliability, slightly higher cost.
- Navien — tankless leader in the Lower Mainland. Condensing models are very efficient and have great cold-climate performance.
- AO Smith — solid tank lineup, common in big-box stores. Some models have slightly shorter anode life in our water conditions.
- Giant — Canadian-made, good value, strong on cold-climate features. Underrated in our experience.
- John Wood — Canadian-made, reliable, particularly good warranty support locally.
- Rinnai — tankless competitor to Navien. Solid units, slightly fewer features at the same price point.
Warranty length matters more than brand pride. Tank warranties run 6, 8, 10, or 12 years — the difference is mostly anode quality. A 10–12 year warranty tank costs slightly more but lasts noticeably longer. For tankless, expect 12 years on the heat exchanger and 5 on parts.
How to plan the install
Most tank-for-tank swaps are completed in 2–3 hours and can be done same-day. Common variables that extend timing:
- Tank-to-tankless conversion: 4–6 hours, often a half to full day
- Switching fuel type (gas → electric or vice versa): half to full day plus permit
- Old unit in a hard-access spot (tight closet, attic): extra time for removal
- Code-mandated upgrades (expansion tank if going from open-loop to closed-loop, new shut-off valve, dielectric unions): add 30–60 minutes
Frequently asked
Same-day replacement?
Yes, for any standard-size gas or electric tank in our stock. We carry 40-gallon and 50-gallon gas tanks on the truck and same-size electric. Tankless installs typically need 1 business day's notice for unit pickup and venting parts.
Removal and haul-away of the old unit?
Included in every Mr. Plunger water-heater install. We dispose of the old unit at a Metro Vancouver recycling depot — no extra charge.
Permit handled?
Like-for-like replacement: typically no permit needed. Tank-to-tankless conversion, fuel-type change, or relocation: permit required, we pull it and coordinate the inspection.
Got the problem we just described? We answer 24/7 across Surrey, Langley, Vancouver, Burnaby, Coquitlam, Delta, White Rock, and Richmond. Call Mr. Plunger Plumbing & Drainage at (604) 870-1442 — real plumber on the line, exact ETA before dispatch, up-front quote before any work starts.