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Every water heater type has trade-offs. Here's an honest comparison.
| Feature | Tank | Tankless | Heat Pump |
|---|---|---|---|
| Installed Cost | $2,500 | $5,000–$7,000 | $3,500–$7,000 |
| Monthly Energy Cost | $30–$50 | $20–$35 | $12–$25 |
| Lifespan | 8–12 years | 20+ years | 13–15 years |
| Hot Water Supply | Limited by tank size | Unlimited | Limited by tank size |
| Space Required | Large (floor space) | Small (wall-mounted) | Large + clearance |
| Federal Tax Credit | None | Up to $600* | Up to $2,000 |
| Best For | Budget installs, simple swap | High demand, long-term savings | Max efficiency, eco-conscious |
*Gas tankless units with UEF ≥ 0.82 qualify for the 25C tax credit through 2032.
All installations in Bellevue must meet Washington State Plumbing Code and local amendments.
Required for all installations. Typically $85–$150. Your plumber handles the application and scheduling.
Two straps required — upper and lower third of the tank. Required by Washington state code.
Required on all closed plumbing systems to absorb thermal expansion and protect pipes.
Gas units require B-vent flue or direct vent. Power-vent models use PVC through an exterior wall.
Required for all indoor installations to catch leaks and route water to a drain.
Dedicated gas and water shutoff valves must be within reach of the unit.
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Tank water heaters cost $2,500 installed. Tankless installation runs $5,000–$7,000. Heat pump units cost $3,500–$7,000 but qualify for up to $2,000 in federal tax credits.
It depends on your household. A 50-gallon gas tank is the most popular choice for Bellevue homes with 3–4 people. Tankless is best for high-demand households or long-term savings. Heat pump is best for max efficiency.
A new tank installation takes 2–4 hours. Tankless takes 4–8 hours. If you're switching fuel types or running new gas/electrical lines, it may take a full day.
Only if you're installing a tankless electric unit (which requires 120–160 amps) or a heat pump model. Standard electric tank heaters use a 30-amp circuit that most homes already have.
Yes, with proper code compliance. Indoor installations require a drain pan piped to a drain, proper venting for gas units, and adequate clearance. Attic installations may add to labor cost due to access difficulty.
A plumbing permit ($100–$175) is required by the City of Bellevue. Your plumber handles the application, pays the fee, and schedules the required inspection after installation.
Over 20 years, tankless typically costs less than tank because you buy one unit instead of two. You also save 24–34% on monthly energy costs. The break-even point is usually 7–10 years. See our tankless page for a full comparison.
A proper quote should include the unit, labor, permit fees, old unit disposal, earthquake straps, expansion tank, and drain pan. Ask your plumber to itemize — avoid quotes that bundle everything into one number.
Water Heater Installation Service Near Me in Bellevue WA