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Rinnai Tankless Leak Cleanup in Kirkland, WA: Same Day Drying

Rinnai tankless heaters hang on the wall, often inside a garage, closet or utility room that backs onto finished living space. When one leaks, water can run down and behind the drywall before you ever see a puddle. Our emergency Rinnai leak cleanup team finds where the water went, dries the wall cavity and floor, and documents it for your insurance. We answer 24 hours a day and send a same day crew across Kirkland, WA.

Call (425) 592-3603Get Rinnai leak cleanup
  • Rinnai tankless units
  • Wall cavity checks
  • Same day crews
  • Answered 24/7

Independent restoration company. Not affiliated with, endorsed by or an authorized service provider for Rinnai. We clean up water damage; we do not repair or install water heaters.

Wall-mounted Rinnai tankless heater leaking from its service valves
Leaks behind walls,
found and dried

Is it a leak or normal condensate?

Condensing Rinnai models make a small, steady amount of water while heating. It should flow through a condensate line to a drain. That is normal. Water dripping from the unit itself, its valves, or onto the wall or floor is not. If you are unsure, turn off the water and power to the unit, put a towel under it, and call us. Our leak detection tools check the wall behind it.

Rinnai leak points

Where Rinnai tankless heaters usually leak

Service valves

The isolation valves under the unit, used for flushing, can leak from caps or worn seals.

Pressure relief valve

It may release water if pressure or temperature spikes, or if the valve is worn.

Condensate line

A clogged, kinked or disconnected line spills water near the unit.

Heat exchanger

Scale and age can lead to internal leaks that drip from the bottom of the cabinet.

Vent condensation

Poorly sloped vent pipes can drip condensation back toward the unit or wall.

Wall connections

Fittings where pipes enter the wall can leak into the cavity behind the heater.

Tankless vs tank

How Rinnai tankless leaks differ from tank leaks

How Rinnai tankless leaks differ from tank leaks
Tank water heaterRinnai tankless
Water releasedCan dump 40 to 80 gallonsSmaller, slower leaks
Where it goesFloor around the baseDown the wall and inside the wall cavity
How you noticeBig puddleStains, swelling baseboards, musty smell
Biggest riskFlooded roomHidden rot and mold inside the wall
Cleanup focusFloor extraction and dryingWall cavity and subfloor drying
Maintenance matters

Why flushing your Rinnai helps prevent leaks

Over time, minerals in water build up as scale inside the heat exchanger. Scale makes the unit work harder and can stress its parts.

Eastside water

Water on the Eastside is generally on the soft side, so scale builds slower than in many parts of the country. Rinnai still recommends periodic flushing. Your installer can tell you how often for your model and water.

Use the right valves

Flushing uses the service valves under the unit. If they are not closed and capped properly afterward, they can drip. That is one of the most common small leaks we find.

Check the condensate line

On condensing models, make sure the condensate line drains freely and is not blocked by debris or kinked behind a cabinet.

When water got into the wall

We dry wall cavities through small holes instead of tearing out large sections. If drywall is soft, our drywall repair team replaces it.

Our process

How we clean up after a Rinnai leak

  1. Find the water's path

    We trace water from the unit, down the wall and under the floor with meters and thermal imaging.

  2. Remove standing water

    Floors and any nearby carpet are extracted.

  3. Open small access points

    Tiny holes at the base of the wall let us dry the cavity without big demolition.

  4. Dry and monitor

    Air movers, wall cavity drying and dehumidifiers run until readings hit the goal.

  5. Report the source

    We note where the leak came from for your installer and insurer.

  6. Patch and paint

    Small access holes and any damaged drywall are repaired.

Rinnai in Kirkland

Where Rinnai tankless units sit in Kirkland homes

Remodeled homes
Owners in Houghton and Lakeview often swap tanks for tankless during remodels.
Garages near bedrooms
In Kingsgate and Rose Hill, the garage wall the unit hangs on may back onto a bedroom.
Newer townhomes
Townhomes in Totem Lake often mount tankless units in closets above finished floors.
Other water heater brands

We also clean up after these heaters

View all 25 brands

Independent restoration company. Not affiliated with these manufacturers.

Service areas

Rinnai leak cleanup near you

Same day cleanup across Kirkland and nearby Eastside cities.

View all service areas
Related services

Services for Rinnai tankless leaks

View all 25 services
Helpful guides

Guides for Rinnai owners

Read all water damage guides
FAQs

Rinnai leak questions

Why is my Rinnai tankless leaking?

Common causes are loose or worn service valve caps, a relief valve releasing water, a blocked condensate line, or an internal heat exchanger leak. A licensed installer can confirm the cause.

Is water from the condensate line normal?

Yes, on condensing models. A small, steady flow into a drain is normal. Water dripping from the unit or onto the wall or floor is not.

Can a tankless water heater leak inside the wall?

Yes. Water can run down the back of the unit or from pipe connections into the wall cavity. Look for stains, swollen baseboards or a musty smell near the unit.

Do tankless heaters cause less water damage than tanks?

They usually release less water at once, but small leaks can go unnoticed longer and cause hidden damage inside walls.

How often should I flush my Rinnai?

It depends on your model and water. Rinnai and your installer can give you the right schedule. Make sure service valves are closed and capped after each flush.

Do you service Rinnai units?

No. We clean up and repair water damage. A licensed plumber or Rinnai-trained installer services the heater.

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Rinnai dripping down the wall? Call now.

Call (425) 592-3603 for 24 hour Rinnai tankless leak cleanup in Kirkland. See all brands we cover or our homepage.

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