Tankless Water Heater Installation in Kitsap County, WA
A tankless unit gives you hot water that doesn’t run out and hands back the floor space a tank was using. It also asks more of your house than a tank does: gas volume, venting, sometimes a circuit. A to Z handles tankless water heater installation, repair, and descaling right across the Kitsap Peninsula and out through the West Sound, and will tell you before anyone spends money whether your house is a good candidate.
- Third generation in the trades
- Kitsap local. No ferry, no Narrows.
- Done right, Labor backed by a full year
- Third generation in the trades
- Kitsap local. No ferry, no Narrows.
- Done right, Labor backed by a full year
- Third generation in the trades
- Kitsap local. No ferry, no Narrows.
- Done right, Labor backed by a full year
- Third generation in the trades
- Kitsap local. No ferry, no Narrows.
- Done right, Labor backed by a full year
Tankless Water Heater Installation, Start to Finish
What the Install Actually Involves
Tankless water heater installation is not a like-for-like swap, whatever the box implies. A gas unit fires at several times the input of a tank burner, so the existing gas line is often undersized for it and the meter sometimes is too. The old B-vent cannot be reused; tankless needs its own sealed venting run. A condensing unit needs somewhere to drain condensate. Even a gas unit needs a power supply.
None of that makes tankless a bad idea. It just means the honest quote comes after someone has looked at the gas line, the vent path, and the panel.
Sizing by Flow Rate and Temperature Rise
This is where most tankless disappointment comes from. A tank is sized by how much hot water it holds. A tankless unit is sized by how much it can raise the temperature of water moving through it, measured in gallons per minute at a given temperature rise.
That matters more here than in most of the country. Groundwater coming into a Kitsap house is cold, so the unit has to work across a bigger temperature gap to reach a usable shower temperature, and the flow rate it can actually deliver drops accordingly. A unit rated for a warm-climate install will underperform on the peninsula. We size against your incoming water temperature and the fixtures you actually run at once.
New Builds and Replacements
New construction is the easy case, because the gas line, vent path, and drain get planned around the unit instead of retrofitted to it. A tankless water heater installation replacing an existing tankless is usually straightforward too. The involved one is a first-time conversion, which is its own section below.
Converting a Tank to Tankless
Whether It Pays Off for Your House
Sometimes the answer is no, and we’d rather say it early. The efficiency advantage is largest in households with low to moderate daily hot water use, and it narrows as usage climbs, because a tank’s standby loss matters less when the tank is being emptied and refilled all day anyway. A big household running two showers and a dishwasher is the case where the payback stretches out.
The other half of the math is how long you plan to be in the house. A tankless unit will typically outlive a tank by years, which is real value if you’re staying and less relevant if you’re selling in two.
What Drives the Cost of Converting
The unit is rarely the biggest line on a conversion. What moves the number is gas line resizing, a new vent run and where it can penetrate, condensate drainage, an added circuit, and whether the unit is staying in the same spot or moving to make the venting work. A house with a short exterior wall run and adequate gas is a very different job from a heater buried in a centre closet.
We don’t publish figures for this, because two conversions on the same street can differ by a wide margin on venting alone. You get the real number after a look, before anything starts, and if it sends you back toward traditional water heaters we will say so.
Tankless Water Heater Repair
Error Codes and What They Usually Mean
A tankless unit tells you what is wrong, which is more than a tank ever does. Ignition and flame failure codes usually point at gas supply, the vent, or the igniter. Overheat codes are very often scaled in the heat exchanger rather than a failed unit. Flow sensor faults can be a stuck sensor or debris off a well.
Read the code off the display before you call. It saves diagnostic time and sometimes tells us what to bring.
Cold Water Sandwich and Minimum Flow
A short burst of cold in the middle of a shower is the cold water sandwich, and it is normal behaviour rather than a fault: the water sitting in the pipe from the last draw arrives before the burner catches up. Some units handle it better than others.
Every tankless unit has a minimum flow rate it needs before it will fire at all. A tap trickled slowly, or an aerator clogged with well sediment, can leave you with cold water from a perfectly healthy heater. Worth checking before booking tankless water heater repair.
Descaling and Tankless Maintenance
Why Kitsap Water Scales a Heat Exchanger Faster
A tankless heat exchanger is a narrow passage, and narrow passages are unforgiving about mineral content. Much of unincorporated Kitsap runs on private wells with iron, manganese, and hardness that no one is treating unless the homeowner chose to. Scale builds on the exchanger wall, the unit works harder to hit the same temperature, and eventually it throws an overheat code and stops.
This is the single reason tankless units fail early around here, and it is entirely preventable. Water softeners fitted ahead of the unit stop most of that scale forming at all.
The Annual Flush and Isolation Valves
Tankless water heater maintenance means an annual descaling flush, more often on aggressive well water. We circulate a descaling solution through the exchanger, clear the inlet screen, and check the venting and condensate path while we’re there.
Isolation valves are what make that a short job. They are a small pair of service valves fitted either side of the unit, and if your installer skipped them, every future flush becomes a much bigger visit. We fit them as standard, and we can add them to a unit that went in without.
Tankless vs Tank, Honestly
Where Tankless Wins
Hot water that does not run out, a wall instead of a floor footprint, a longer service life, and lower standby energy use. For a household that runs hot water in bursts rather than all at once, and plans to stay in the house, it is usually the better long-term unit.
Where a Tank Is Still the Better Call
A straight tank replacement wins on up-front cost and simplicity, and there is no shame in it. If your gas service will not support a tankless without an upgrade, if the venting has nowhere sensible to go, or if the heater died this morning and you need hot water tonight, a tank is the sensible answer. We will say so.
Getting a Straight Answer Before You Commit
What We Check Before Quoting
The Line We Install, and a Year on Parts and Labor
Navien is the tankless line Alex installs. We hold no manufacturer certification with them or anyone else, which is worth stating plainly rather than implying otherwise with a badge. If you already have a different brand on the wall, tell us the model when you call and we will say straight away whether it is something we work on.
Every install carries a full year on parts and labor, and any current deals get applied to your quote before you approve it. Alex lives out here, so Silverdale, Port Orchard, Poulsbo, Gig Harbor, and Belfair are all a normal drive rather than a boat ride.
What Kitsap Says: "Wish We'd Found You Sooner"
See what homeowners around Kitsap have to say about working with Alex and the A to Z team.
A to Z plumbing is by far the best plumbing company out there. They are so fast to respond to your issues. They are reasonably priced and won’t charge you for things you don’t need. 100% recommend.
August 23, 2023
Alex and Michael have done outstanding work on three different plumbing issues. They respond quickly to scheduling work, show up on time, and work efficiently. They are very knowledgeable about each issue I presented. They quote pricing up front so there are no surprises. They are fair in their pricing. They are friendly and always leave a clean work area. I would highly recommend A to Z Plumbing. I know we will ALWAYS call them for any plumbing needs.
July 17, 2024
Great customer service, quality workmanship and Alex is just a great guy to work with.
August 8, 2026
My husband and I are very pleased with Alex’s work. He is very professional and trustworthy We enjoyed working with him. We will definitely use him again and be happy to refer him and his company to anyone looking for a reliable and service-oriented plumber!
September 9, 2025
Alex and Tanner were amazing! We had an interesting, and I would say challenging, situation that needed to be addressed in several ways. They were both professional and competent. Alex returned messages and calls promptly, and addressed all the hiccups we encountered quickly. He is a kind and honorable person – we are SO glad we called A to Z plumbing, and will absolutely call them for all our plumbing needs!
September 9, 2025
10/10 Would recommend. A to Z plumbing came out to repair a busted water main for me as an emergency service. Alex and his team arrived within 15 minutes of my emergency and remained cool, calm and collected. They worked together to solve the problem quickly and efficiently. They were knowledgeable and professional from start to finish. I couldn’t be happier with their service and I will be using them again for future plumbing related services. A to Z plumbing had clear pricing that was consistent with their industry. If you want something done right, don”t do it yourself. Just call A to Z plumbing and enjoy your peace of mind.
March 9, 2026
Questions Homeowners Ask Before We Come Out
Do I need a bigger gas line for a tankless unit?
Often, yes. A tankless burner fires at several times the input of a tank burner, so a line sized for the old heater may not carry enough gas, and occasionally the meter needs looking at too. It is one of the first things we check, because it changes the job significantly.
How often does a tankless need descaling on well water?
Once a year is the general rule, and more often on aggressive well water. Much of unincorporated Kitsap is on untreated private wells, and scale is what kills tankless units early here. If your unit is throwing overheat codes, it is usually overdue rather than failing.
Can the tankless go where my tank is now?
Sometimes, but not always. Tankless needs its own sealed vent run with somewhere sensible to terminate, plus condensate drainage on a condensing unit. A heater in a centre closet is harder to work with than one on an exterior wall. We check the vent path before promising a location.
Will one tankless unit run two showers at once?
It depends on the unit’s flow rate at our local temperature rise, which is higher here than in warmer states because the incoming groundwater is cold. Some units manage two showers comfortably and some do not. We size against the fixtures you actually run together rather than a number off the box.
Does a gas tankless work in a power cut?
No. Gas tankless units need electricity for the ignition, controls, and fan, so they stop in an outage the same as anything else. Worth knowing before a Kitsap winter, and worth mentioning if a generator is part of your setup.
How long should a tankless last?
Longer than a tank, generally, and considerably longer if it gets flushed on schedule. The units that fail early around here almost always fail on scale rather than age. Maintenance is the whole difference.