Tankless Water Heaters
On-demand hot water with professional tankless installation and service.
Tankless water heaters heat water on demand and can reduce standby energy use compared with a traditional tank. United Plumbing installs and services tankless systems across Northwest Arkansas with code-compliant gas, venting and water connections.
Whether you're upgrading from an aging tank or replacing a failed unit, we'll size the system to your household, handle permits, and walk you through manufacturer warranty and maintenance requirements so you get the lifespan you paid for.
Common tankless water heaters problems homeowners see
Running out of hot water with a full house
Two showers and a dishwasher will empty a tank heater. A properly sized tankless unit heats water as it flows, so it does not run out.
Cold-water sandwich or lukewarm output
Short draws, undersized gas supply or a scaled heat exchanger all show up as inconsistent temperature. We check gas volume and flow rate, not just the unit.
Error codes and shutdowns
Most error codes trace back to venting, gas pressure, ignition or scale buildup. We diagnose the cause instead of resetting it and leaving.
Mineral buildup in the heat exchanger
Mineral buildup can reduce performance and contribute to equipment problems. Maintenance needs depend on the equipment and water conditions.
When to call a licensed plumber
- You are replacing a failed tank and want to know if tankless fits your home
- Your unit is throwing error codes or shutting down mid-shower
- Hot water temperature swings when more than one fixture runs
- The unit has never been descaled
- Gas line sizing, venting or condensate drainage needs to be evaluated
Your tankless water heaters options
New tankless installation
Gas, propane or electric units sized to your fixture count and incoming water temperature, with correct venting and condensate handling.
Tank-to-tankless conversion
We evaluate gas supply, venting route and location first, then handle the gas line work, mounting and water connections.
Repair and diagnostics
Ignition, sensors, flow devices, venting and gas pressure — repaired to manufacturer specification.
Annual descaling
Flushing the heat exchanger and cleaning the inlet screen, which is what manufacturers require to keep the warranty valid.
Ready for help with tankless water heaters?
Talk to a licensed Northwest Arkansas plumber, or send a request and we'll reach out. Available 24/7 — true plumbing emergencies are prioritized for the fastest available response.
Where we provide tankless water heaters in NWA
United Plumbing is based in Northwest Arkansas and handles tankless water heaters throughout the region — including Bentonville, Rogers, Springdale, Fayetteville, Bella Vista and surrounding towns.
City pages for this service
What's included
- New installs and full system replacements
- Gas, electric and propane units
- Annual descaling and maintenance
- Written warranty terms by service
Frequently asked
How long does a tankless water heater last?
Service life varies by unit, water quality, installation and maintenance. We explain the manufacturer's maintenance requirements for the system you choose.
Can a tankless water heater lower energy use?
Tankless systems avoid the standby heat loss of a storage tank. Actual savings depend on household use, fuel type and the selected equipment.
Does a tankless water heater need a bigger gas line?
Often yes. Tankless units fire at a much higher input than a tank heater, so we verify gas volume to the unit and upsize the line when the existing one cannot carry it.
Should I add a water softener with a tankless unit?
That depends on your water conditions and the equipment manufacturer's guidance. We can discuss testing, maintenance and treatment options before installation.
Real tankless water heaters work in Northwest Arkansas
Why Northwest Arkansas homeowners trust United Plumbing
- Licensed and insured in Arkansas
- Available 24/7, including nights, weekends and holidays
- 5.0 rating from 40+ Google reviews
- Locally owned Northwest Arkansas plumbing company
Service calls include an $89 diagnostic fee, disclosed before scheduling. Estimates for qualifying installation and replacement projects are free. Workmanship warranties vary by service and are clearly listed on your written estimate.
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