Ask House Spouse · Plumbing · Water Heaters
How long should a water heater last in Washington?
Short answer
Standard tank water heaters in the PNW last 8–12 years. Beyond year 12, the risk of a burst tank doubles every year. If yours is over 10, check for a manufacture date on the label, put a leak sensor under it, and start budgeting for replacement — a burst tank is 40 gallons on your floor in under two minutes.
How to date your tank
The manufacture date is coded into the serial number on the label. For most brands: the first four digits are year and week (e.g. "2314" = week 14 of 2023). If you can't read it, snap a photo and ask.
Extend its life
Two things matter: flush the tank once a year (10 minutes with a garden hose to a drain), and replace the anode rod at year 5. Neither is a licensed task; both are cheap. Skipping the anode is why most tanks fail at year 8 instead of year 12.
Tank vs. tankless
For 1–3 person households in Snohomish and King County, a right-sized tank still wins on total cost — the install premium for tankless usually doesn't pay back in the tank's lifetime. For 4+ people or homes with a big soaking tub, tankless earns its keep.
What we see on Home Health Assessments
Around 74% of PNW roofs we assess show active moss establishment — accelerates shingle wear by an estimated 3–5 years if untreated.
Caught early on assessment: $220–$650 · Left until failure: $3,500–$22,000
Based on real experience across Snohomish and King County, plumbing issues like this are among the ones homeowners most often miss until they become expensive. Our Home Health Assessment catches them early — while they're still a maintenance item, not a repair.
How the Home Health Assessment worksServices we'd bring to this job
Related questions
Plumbing · Leaks & Water Damage
How do I find a hidden water leak in my house?
Turn off every fixture and appliance, then watch the small red "leak indicator" dial on your water meter for 10–15 minutes. If it moves, you have flow somewhere with everything off — that's a leak. Isolate by shutting off the main to the house and the water heater; the meter tells you if it's on the incoming side or inside.
Safety & Prevention · Water Leak Prevention
Should I install a whole-house automatic water shutoff?
For any home worth over $500K, yes — a Flo by Moen, Phyn Plus, or LeakSmart device installed on the main pays for itself the first time it stops a burst pipe or a failed dishwasher line. Many home insurance carriers offer 5–10% policy discounts for these devices. Install runs $700–$1,400 including a licensed plumber.
PNW Seasonal · Freeze Protection
How do I winterize outdoor faucets in Washington?
Disconnect every garden hose, drain each hose bib by shutting off the interior stop valve and opening the outdoor spigot to drain, then cover with an insulated foam faucet cover. A leftover garden hose is the #1 cause of burst pipes in the PNW — the water in the hose freezes back into the wall and splits the pipe.