Clean cuts and leak-free solder joints on copper pipe. A pipe cutter gives a square edge that seals properly, and the torch lets us make solid connections that hold pressure for decades.
Tankless water heater installation longview WA done right the first time
When you book tankless water heater installation longview WA homeowners trust, you get a unit sized for your home, not a guess off a box.
Serving longview and nearby areas.
How big is the job?
Convert
First-time tankless install with new gas piping, venting, and permit work.
- 1. Swap Replacing an existing tankless unit, reusing the gas line and vent if they meet code.
- 2. Convert First-time tankless install with new gas piping, venting, and permit work.
- 3. Whole house Multi-unit setup or commercial bank, planned in writing first.
Drag the needle to compareTouch and drag the needle
- 30Services from one local team
- 20Areas served around longview
- Sized firstWe measure before we mount
- TestedEvery joint pressure-checked
What is included in a tankless water heater installation
Every install we do includes the unit, the permit, the gas and water connections, the venting, and a full test before we leave.
Work order
Tankless Water Heater Installation- Unit and materials: The tankless unit itself, plus all copper pipe, PEX tubing, fittings, Teflon tape, and plumber's putty needed to complete the connection. We use quality brands like Rheem, Navien, and Bradford White, and we do not substitute without asking you first.
- Permit and inspection: We pull the required permit through Cowlitz County and schedule the inspection. You do not have to chase paperwork or worry about whether the job will pass. That is on us.
- Gas line and venting: Running a dedicated gas line sized for the unit's BTU draw, plus the correct venting for your install location. We verify gas pressure with a manometer and confirm vent slope meets UPC and IPC standards.
- Old unit removal: We drain, disconnect, and haul away your old tank or tankless unit. No leaving it on the curb for you to deal with. The area gets swept and wiped down before we call the job done.
- Full system test: Every joint gets pressure-tested, the unit gets fired and checked for proper ignition, and we verify temperature at the farthest fixture from the heater. You see it working before we leave.
What the first visit covers
First visit
We measure gas pressure, incoming water temperature, and vent path, then confirm the unit size your home needs.
Tankless installation at your home
We handle tank and tankless swaps for Longview houses, from single bathrooms to whole-home setups.
Running out of hot water
Sized for back-to-back showers
Old tank leaking
Drained, removed, and hauled away
High gas bills
No standby loss, fires on demand
Tight utility space
Wall-mounted, floor stays clear
Tankless installation for Longview businesses
Restaurants, salons, and laundromats need hot water that keeps up with peak demand.
Restaurants
Sized for dishwashing and restroom load
Salons and spas
Continuous hot water for back-to-back clients
Laundromats
Multiple units running in parallel
Tankless water heater installation longview WA, explained
A tankless unit is only as good as its install. We size it for Longview's cold water, run the gas and vent to code, and test every joint before we leave. Done right, it lasts 15 to 20 years.
Tankless water heater installation longview WA is the trade of mounting an on-demand unit on your wall, running a dedicated gas line, cutting in the venting, and tying it into your existing copper pipe or PEX tubing so it fires only when you open a tap. There is no 40- or 50-gallon tank sitting in the garage reheating itself all night. A Rheem, Navien, or Bradford White unit heats water as it flows, which is why the sizing math, gas pressure, and vent length matter more than the brand on the box.
Most of our Longview calls come from two places: a 12-year-old tank that finally rusted through, or a family that ran out of hot water during back-to-back showers. If you are searching for tankless water heater install longview options, we start with a load calculation, check your meter and gas line size, and tell you straight whether your home can carry a whole-house unit or needs a two-unit setup. No guesswork, no upsell.
- What it is
- Wall-mounted unit that heats water on demand
- When it helps
- Running out of hot water or a failed tank
- What you get
- Endless hot water and lower gas bills
What our tankless installation process looks like
Five steps, start to finish. Most standard swaps are done in a single day.
Tools and methods we use on every install
Each method answers a different question. Together they leave very little to guess.
For homes with PEX tubing, we use a crimping tool to make secure connections at every fitting. It creates a uniform crimp that will not leak or pull apart under pressure.
We measure gas pressure at the unit to confirm it matches the manufacturer's spec.
For tightening gas and water connections without stripping threads. A quality pipe wrench gives us the leverage to seat fittings properly the first time.
Drilling, cutting, and fastening on site without running cords. Cordless tools let us work efficiently in tight utility closets and garages where power access is limited.
When Longview homeowners call us for tankless
A family of five in a 1970s ranch home off Ocean Beach Highway keeps running out of hot water.
We run a load calculation, check the gas meter capacity, and install a whole-house Navien unit with a recirculation loop so hot…
HomesA Downtown Longview restaurant needs to replace a failing commercial water heater before the lunch rush.
We install a commercial tankless bank sized for peak kitchen and restroom demand.
BusinessesA homeowner in Longview Heights is converting from an electric tank to gas tankless.
We run a new gas line from the meter, install the venting through the side wall, and mount a Rheem unit in…
HomesA property manager in North Longview needs three rental units upgraded to tankless before winter.
We schedule all three installs across two days, pull the permits, and coordinate inspections.
Businesses
How tankless installation works in Longview
Longview sits in the Cowlitz River valley, and our incoming water temperature drops to around 45 degrees in winter. That cold water matters for tankless sizing, because the unit has to raise the temperature further to hit 120 degrees at the tap.
Downtown Longview
Older commercial buildings and mixed-use properties often need commercial tankless banks sized for restaurant and retail hot water demand.
Longview Heights
Mid-century homes with original galvanized pipe frequently need a partial repipe to support a tankless unit's flow rate.
North Longview
Rental properties and multi-family units benefit from tankless installs that reduce after-hours maintenance calls for property managers.
- Downtown Longview
- Longview Heights
- North Longview
- Pine Tree
From problem to finished result.
Slide to compare the photo with an illustrative inspection view. It is generated from the photo, not a measurement.
Photo50-gallon tank to whole-house tankless
Before: A family of four in Downtown Longview had a 50-gallon tank that ran out of hot water every morning. The tank was 11 years old, showing rust at the base, and the gas bill was climbing. They were scheduling showers to avoid cold water.
After: We installed a 199,000 BTU Navien unit with a recirculation loop. Now all four family members shower back-to-back with no temperature drop. The gas bill dropped by about 18 percent in the first full month, and the garage floor is clear.
Failed tank replaced same day
Before: A homeowner in Longview Heights called at 8 a.m. with a tank that had leaked overnight. The garage floor was wet, and they had no hot water. They needed a solution fast, before the water damage spread to stored items.
After: We arrived by 10 a.m., drained and removed the old tank, and installed a Rheem tankless unit by 4 p.m. The homeowner had hot water that evening. We also checked for water damage and confirmed the subfloor was dry.
Commercial restaurant tankless upgrade
Before: A Downtown Longview restaurant had a failing commercial water heater that could not keep up with dishwashing and restroom demand during lunch service. They were losing time and risking health code violations.
After: We installed a commercial tankless bank overnight, sized for peak demand. The restaurant opened on time the next morning with reliable hot water. The owner reported no downtime and no lost revenue. The system passed inspection on the first visit.
Problems our tankless installation solves
Most people call us because something is already going wrong.
Running out of hot water during morning showers
A tank that cannot recover fast enough means cold showers for the third person in line.
Old tank rusting and leaking in the garage
A leaking tank can dump 40 to 50 gallons on your floor before you notice.
High gas bills from standby heat loss
That standby loss shows up on your natural gas bill every month, year after year. A tankless unit only fires when you open a tap.
No hot water at all after a tank failure
When a tank fails, you are without hot water until it is replaced.
Why Longview homeowners switch to tankless
A tankless unit costs more up front than a tank.
Endless hot water
A properly sized unit runs continuously, so the third shower in a row stays hot.
Lower gas bills
You stop paying to keep 50 gallons of water hot 24 hours a day.
15 to 20 year lifespan
Tanks rust out in 8 to 12 years.
Reclaims garage space
A wall-mounted unit frees up roughly the footprint of a small refrigerator. In Longview homes with tight garages or utility closets, that space matters.
What you get on install day
Clear records you can keep and share.
Sizing sheet
Flow rate and BTU calculation for your home
Permit record
Cowlitz County permit and inspection sign-off
Test results
Gas pressure and temperature readings documented
16 years of tankless work in Cowlitz County
Longview Riverbend Plumbing has been installing and servicing water heaters in Cowlitz County since 2010.
Gas pressure
Read at the unit to confirm it matches the manufacturer spec for proper ignition.
Incoming water temp
Measured in winter conditions to size the unit for the coldest month.
Vent length
Checked against the manufacturer chart to confirm the run meets code.
Is your longview area covered?
Type your ZIP code or town to check. If you are nearby and not listed, call and ask.
longview ZIP codes
- 98632
Towns we serve.
Based in longview and covering the places around it. Pick one for local details.
What Longview homeowners say
Our old tank started leaking on a Friday morning. Called at 9, had a Navien on the wall and running hot water by 4 that afternoon. They ran a new gas line and vented it through the side wall. Clean work, no mess left behind, and the price matched the quote exactly.
We have four kids and the tank could not keep up. Longview Riverbend sized a two-unit setup for us and explained why one unit would not cut it with our cold incoming water. Six months in, nobody has run out of hot water once. Worth every penny.
I manage six rental units and have used these guys for three tankless replacements now. They pull the permit, handle the inspection, and keep me posted the whole way. Tenants have not had a single complaint about hot water since the swaps. That is the kind of reliability I need.
Frequently Asked Questions
Short answers for the first few minutes. The team can cover the rest.
Still have a question?
Describe what you are seeing and we will point you to the right next step.
(360) 886-3111Whole-house units with long vent runs or a gas meter upgrade push toward the top of the range. We give you the number before we start.
Yes, if you plan to stay in the home more than five years. The unit costs more up front, but it lasts 15 to 20 years versus 8 to 12 for a tank, and it stops the standby gas loss. Longview's cold winter incoming water means sizing matters, so we run the math before recommending one.
We do. If you already have a tankless unit that failed or is undersized, we can swap it, often reusing the existing vent and gas line if they meet current code. Most replacements take four to six hours and we haul the old unit away. Call and we will confirm what your setup needs.
A standard replacement runs four to six hours. A first-time install converting from a tank takes six to eight hours, because we are running new gas piping and venting. If your home needs a gas meter upgrade from the utility, that can add a day or two of scheduling on their end.
Get your tankless water heater installation longview WA scheduled today
(360) 886-3111Hot water should not be a waiting game. Call Longview Riverbend Plumbing and we will size the right unit for your home, pull the permit, and get it running.
Contact Longview Riverbend Plumbing
Call us at (360) 886-3111 or email [email protected]. We answer the phone during business hours and run after-hours emergency calls for burst pipes and sewer backups. Most same-day appointments are booked before noon. Tell us what you are seeing and we will send the right plumber with the right parts.