Washington Plumbing & DrainKitsap, Pierce & Mason Counties
Water Heaters · Pierce County

Tankless Water Heater Installation in Tacoma, WA

Endless hot water is the promise of tankless, and in a properly installed Tacoma home it is kept. The installation is what decides it: gas sizing, venting, isolation valves and commissioning. Washington Plumbing & Drain does all four on every job.

35 to 40 minutes from Port Orchard across the Tacoma Narrows Bridge, longer at the evening rushfrom Port OrchardPierceCounty
Rinnai tankless water heater mounted on a wall with copper piping, isolation valves, expansion tank and Flo smart valve — Tankless Water Heater Installation for Tacoma homes

Then there is the Puget Sound winter. Tacoma gets a touch less rain than Seattle and a touch more wind off the Narrows. The December 2022 and January 2024 cold snaps froze uninsulated basement lines, garage water heaters and attic pipes in the older houses, and the big winter rains overload old side sewers and basement floor drains. Tacoma sits about 35 to 40 minutes from Port Orchard across the Tacoma Narrows Bridge, longer at the evening rush from our base, close enough that same-day and next-day visits are the norm rather than the exception.

Why tankless water heater installation is a little different in Tacoma

Vacation homes and rentals around Tacoma benefit from tankless because there is no stored tank to leak during an empty month. Paired with a smart shutoff valve, it is a low-worry setup for an owner who is not nearby.

The housing itself shapes the job. Tacoma's bones are old. The North End, Stadium District, Old Town, Hilltop and Lincoln are full of 1890s to 1920s Victorians and Craftsman bungalows, with 1940s wartime housing in South Tacoma and the East Side. That means cast iron drains, galvanized supply, lead-jointed clay side sewers, basements with floor drains, and original fixtures that have been patched by six generations of owners.

Local conditions that affect tankless water heater installation in Tacoma

Here is a Tacoma detail that changes how we approach the job: Lead and galvanized water services between the meter and the house on pre-war lots

Winter water comes into Tacoma homes cold, and that limits how many gallons per minute a tankless unit can bring to shower temperature. We size for the coldest month so two fixtures at once still work in January.

The pattern we see most in Tacoma is this: Un-permitted remodels in flipped houses with bad venting and S-traps

Many older Tacoma gas lines were sized for a tank heater and a stove. A tankless burner needs much more, and we calculate the whole-house gas load and upsize the line as part of the installation rather than letting the unit starve.

Rinnai tankless water heater installed in a basement with new copper and gas piping
Tankless conversion in a basement: new gas line, new venting and clean copper connections.

Signs Tacoma homeowners call us for tankless water heater installation

Worth a call

  • You plan to stay in the house long enough for the efficiency to pay back
  • A remodel or ADU is adding hot water demand the current tank cannot meet
  • The household runs out of hot water with two showers back to back
  • You want the closet or garage space the tank occupies
  • The tank heater is at the end of its life and gas is already at the location

How we handle tankless water heater installation in Tacoma

Here is how it runs when we come to Tacoma for tankless water heater installation: assess fuel, gas capacity and water, choose the unit and the location, flat, itemized quote, install and connect, commission under load, then permit, warranty and schedule. Nothing is started until you have approved a flat price.

Read the full step-by-step for tankless water heater installation →

Tacoma neighborhoods and areas we serve

Our Tacoma work runs from East Side and McKinley Hill across to Downtown and the Dome District, and out around Tacoma Dome and Museum of Glass. Anywhere inside the Pierce County side of our territory is fair game.

East Side and McKinley HillNortheast Tacoma and Browns PointWest End and NarrowsNorth End and ProctorStadium DistrictOld TownHilltopDowntown and the Dome District

Tankless Water Heater Installation questions from Tacoma

How long does a tankless conversion take in Tacoma?

Most are done in a day with hot water back by evening. Adding a gas line to a new location or running a long vent can push it to two days, and we tell you up front.

Do you service tankless heaters in Tacoma after installing them?

Yes. We descale and service tankless units across Pierce County, and most customers put the new unit on a maintenance interval matched to their water.

Will a tankless heater work on well water in Tacoma?

With a sediment filter and a regular descaling schedule, yes. On very hard or iron-heavy wells we discuss filtration first and will say if a tank is the better fit.

Do you pull the permit for a tankless installation in Tacoma?

Yes, for both the plumbing and the gas line, and we schedule the inspection.

Why do you install Rinnai?

They have held up in this climate, local supply houses stock the parts, the units keep a diagnostic history that makes service faster, and the warranty is honored. We would rather install one brand we trust than whatever is cheapest that week.

Tacoma homeowners often find us after a larger outfit quoted a replacement for something that only needed a repair. We would rather earn a customer for life than win one big ticket.

Google reviews

Customers on our tankless water heater installation work

★★★★★
Greg is awesome! He came out to service our thankless water heater (which hadn't been serviced in 11 years) and did a great job. He really put in a lot of effort to minimize any mess that it involved and was very personable during the job. His communication is also very clear.
Deborah R · Google review · 2 years ago
★★★★★
Gregory did fantastic work descaling my tankless water heater, was in and out within an hour. They texted me when he was on his way and gave me an ETA which was MUCH appreciated. Kind, courteous and professional. I will be using them for my future plumbing needs.
Krysta Cordell · Google review · 3 years ago

Tankless Water Heater Installation in Tacoma?

Flat-rate price before we start. Tacoma is about 35 to 40 minutes from Port Orchard across the Tacoma Narrows Bridge, longer at the evening rush.

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