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Tankless Water Heater Installation in West Seattle

Endless Hot Water • Energy Efficient • Professionally Installed

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Call Now: 206-906-9279

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tankless water heater

Anthony’s Plumbing provides tankless water heater installation and replacement in West Seattle and surrounding areas. We install properly sized systems with correct venting and gas supply to ensure long-term performance and reliability.

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Benefits of Tankless Water Heaters

  • Endless hot water

  • Energy efficient operation

  • Longer lifespan than traditional tanks

  • Space-saving design

  • Reduced risk of tank leaks or failure

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​​Is Tankless Right for Your Home?
Not every home is a good fit for a tankless system. Gas supply, venting, and usage demand all need to be evaluated. We’ll walk you through your options and recommend what actually makes sense for your home.​

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This usually includes:

  • Removal of the existing water heater (if applicable)

  • Installation of a properly sized tankless unit

  • Venting and gas / electric connections

  • System setup, testing, and calibration

  • Manufacturer warranty and labor warranty, plus extended unit registration warranty

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What effects cost?

  • Type of unit and size being installed

  • Venting requirements and installation location

  • Distance to gas line

  • Upgrades needed to meet current code

  • Overall complexity of the installation

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We always evaluate your setup first and give you clear, upfront pricing - no surprises.

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Gas vs Electric Tankless Systems

 

In most homes, we install and recommend gas tankless water heaters because they provide consistent hot water and reliable performance for whole-home use.

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We do not install electric tankless systems. In our experience, they often require major electrical upgrades and can struggle to keep up with demand, especially in full-size homes.

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Our focus is on installing systems that perform well long term, so you’re not dealing with inconsistent hot water or future issues.

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What’s Included in Our Tankless Installations

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  • Removal and eco-friendly disposal of existing water heater

  • Proper sizing and installation of tankless unit

  • Gas line evaluation and upgrades if needed

  • Professional venting installation to code

  • Installation of isolation valves for future service

  • Full system setup, calibration, and performance testing

  • Cleanup of work area

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We install tankless water heaters throughout West Seattle, including Admiral, Alki, Fauntleroy, and surrounding neighborhoods.

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Why Choose Anthony’s Plumbing

  • Locally owned in West Seattle

  • 20+ years of plumbing experience

  • Honest recommendations (no upselling)

  • Clean, professional installations

  • Licensed, bonded, and insured

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Thinking about going tankless?
Call Anthony’s Plumbing today to schedule an evaluation and see if your home is a good fit.

📞 206-906-9279

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Tankless Water Heater FAQ
What brand of tankless water heater do you recommend?

We typically recommend Rinnai tankless water heaters based on our experience in the field.

Rinnai systems have proven to be reliable, long-lasting, and require less maintenance compared to many other brands. We’ve found they tend to have fewer issues over time and perform consistently when properly installed and sized.


How much does a tankless water heater cost in Seattle?

Tankless water heater installation costs in Seattle can vary depending on the size of the unit, demand, and the scope of work required.
 

As a general ballpark, tankless water heater installations typically range from $4,800 to $6,500 on average.

Pricing can vary based on factors such as gas line upgrades, venting requirements, electrical needs, and installation location.

The best way to get an accurate price is to have us evaluate your home and hot water demand.


Do you install tankless water heaters in both homes and businesses?

Yes — we install tankless water heaters in both residential homes and commercial settings.

We properly size each system based on usage demand to ensure consistent performance and reliable hot water delivery.


Do tankless water heaters require gas line upgrades?

In many cases, yes.

Tankless systems often require a larger gas supply line than traditional tank water heaters. We evaluate your existing gas system and upgrade it if needed to ensure safe and proper operation.
 

Are tankless water heaters worth it?

Tankless water heaters can be a great option for many homes.

They provide continuous hot water, take up less space, and typically last longer than traditional tank systems. When properly installed and maintained, they offer reliable long-term performance.
 

How long do tankless water heaters last?

Tankless water heaters can last significantly longer than traditional tank units.

With proper installation and maintenance, it’s common for a tankless system to last 15–20 years or more.
 

Do tankless water heaters require maintenance?

Yes — regular maintenance is important to keep a tankless system running efficiently.

We recommend periodic flushing and servicing to prevent buildup and extend the life of the unit.
 

Can I replace my existing tank water heater with a tankless system?

Yes — but it depends on your home’s setup.

Converting from a tank to a tankless system may require upgrades to gas lines, venting, and electrical components. We evaluate your system and make recommendations based on what’s needed for safe and proper installation.

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Performance and Proper Sizing Matter

Tankless water heaters are only as good as the way they are installed. Proper sizing, gas supply, and venting are critical to ensure the system performs as expected. We focus on installing systems that are built to last and operate reliably for the long term.

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