Water Heater Questions & Answers
Why is my water heater not producing hot water?
The most common causes are a failed thermocouple or pilot light (gas units), a tripped breaker or burned-out heating element (electric units), or a faulty thermostat. If you've checked the obvious — breaker, pilot light, temperature dial — it's time to call for professional water heater repair.
How much does it cost to replace a water heater?
In the Bellevue area, a standard 50-gallon tank water heater costs $2,500 installed. Tankless units run $4,500–$7,000. Price depends on fuel type, unit size, and installation complexity. See our full water heater replacement cost estimator for detailed breakdowns.
Should I repair or replace my water heater?
If your unit is under 8 years old and the repair costs less than half the price of a new one, repair makes sense. If it's over 10 years old, leaking from the tank, or needing frequent repairs, replacement is almost always the better investment.
How long does a water heater last?
Tank water heaters typically last 8–12 years. Tankless water heaters last 20+ years with annual maintenance. Hard water, heavy usage, and lack of maintenance shorten lifespan. Flushing the tank annually can add 2–3 years.
Why is my water heater leaking?
A loose drain valve or corroded fitting is an easy fix. But if water is pooling under the tank itself, the inner lining has likely failed — that can't be repaired and you'll need a full replacement. Shut off the water supply and call a plumber immediately for emergency service.
Is a tankless water heater worth it?
For most Bellevue homes, yes. Tankless units use 24–34% less energy, never run out of hot water, and last twice as long as tank heaters. The higher upfront cost ($4,500–$7,000 vs. $2,500) is offset by lower monthly bills and fewer replacements over time.
What size water heater do I need?
A 40-gallon tank works for 1–2 people. A 50-gallon handles 3–4 people. For 5+ people, consider a 75-gallon tank or a tankless unit rated for 8+ GPM. Your plumber will size it based on your household's peak hot water demand — number of bathrooms, appliances, and simultaneous usage.
Why is my water heater making popping or rumbling noises?
Sediment buildup at the bottom of the tank hardens and traps water beneath it, which boils and creates those sounds. Flushing the tank usually solves it. If the noise is severe or the unit is old, the sediment may have caused permanent damage and a plumber should inspect it.
How long does water heater installation take?
A standard tank-to-tank swap takes 2–4 hours. Tankless installation takes 4–8 hours, longer if gas line upgrades or new venting is needed. Most installations are completed in a single visit.
Do I need a permit to replace a water heater in Bellevue?
Yes. The City of Bellevue requires a plumbing permit for water heater replacement. Permit fees are typically $85–$150. A licensed plumber handles the permit application and schedules the required inspection — you don't need to do anything yourself.
