Gas water heater replacement

A gas tank heater is the workhorse of most Seattle homes with Puget Sound Energy service. Replacing one properly means getting the venting and the gas connection right, not just the tank.

What matters on a gas replacement

Done to code

  • VentingThe flue must rise and connect tight. A bad vent connection spills combustion gases into the house. We check draft after firing.
  • Gas connectionA new flex connector, a sediment trap, a shut-off valve, and a leak test.
  • Expansion tankRequired on Seattle’s closed systems. Sized to the heater and pre-charged to your house pressure.
  • Relief dischargeThe T&P valve discharge piped to a safe point, never capped.
  • Seismic strappingTwo straps, anchored to framing. This is Seattle.

Power vent, direct vent or atmospheric

Most older Seattle homes have an atmospheric (natural draft) heater venting into a chimney or B-vent. If the old flue is in bad shape, or the heater is in a tight space, a power-vent unit that vents in PVC through a wall is often the better replacement. We will recommend based on what the house has.

Why Queen Plumbing

Gas is what we do every week. The heater is installed, the gas is leak-tested, the vent draft is checked, the permit is pulled and the inspection arranged. Free estimate; same-day for most calls.

Licensed, local, and on the record

Gas water heater questions

Water heater replacement · Gas line plumbing

Should I switch from gas tank to tankless?

If you want endless hot water and the space, and the gas and vent routes work, yes. If you want the simplest, lowest-cost replacement today, a new tank is fine. We give both prices. Tank to tankless →

My pilot light keeps going out. Replace or repair?

Often a thermocouple or gas valve, repairable on a younger heater. On a heater past ten years, we usually advise replacement.

Talk to a Seattle plumber today

Tell us what is happening and we will give you a free, written estimate. Same-day service is available for most calls. No pressure, no obligation.

Serving Seattle, Shoreline, Bellevue and Mercer Island.

Call Free estimate