Tankless Water Heaters Lawrenceville, GA
On demand hot water that never runs out and takes up a fraction of the space. We install, repair, and descale tankless systems throughout Lawrenceville and Gwinnett County.
Tankless Water Heater Specialists
Installation, repair, and the maintenance most people skip
A tankless water heater heats water only as it flows, so you never run out and you are not paying to keep 50 gallons hot overnight. For a Lawrenceville household that runs back to back showers, or a home where the water heater eats a whole closet, the switch usually pays for itself in both comfort and space.
The part most homeowners are never told: tankless units need annual descaling, and North Georgia's mineral content makes that non-negotiable. Skip it for a few years and the heat exchanger scales up, the unit short cycles, and you get the cold water sandwich. We install, service, and descale tankless systems, including units we did not put in.
Common Tankless Problems We Fix:
- Cold water sandwich between bursts of hot water
- Unit throwing an error code and shutting down
- Reduced flow or temperature after a few years of use
- Ignition failure on gas fired units
- Scale buildup restricting the heat exchanger
- Undersized system that cannot keep up with demand
Our Tankless Services
From first install to year fifteen of maintenance.
New Installation
Sized on flow rate and temperature rise, with correct gas line, venting, and condensate handling.
Tank to Tankless Conversion
Full conversion including gas line upsizing and venting, which most tank swaps cannot skip.
Tankless Repair
Error code diagnosis, ignition faults, flow sensors, and heat exchanger issues on all major brands.
Descaling & Flushing
Annual vinegar or solution flush to clear mineral scale and restore full output.
Electric Tankless
Point of use and whole home electric units, with honest advice on panel capacity first.
Maintenance Plans
Scheduled annual service that keeps the manufacturer warranty valid and the unit at full output.
Tankless in Gwinnett County Homes
What local water and local gas supply mean for your unit.
Descaling Is Not Optional Here
Mineral content in Gwinnett County water deposits scale inside a tankless heat exchanger faster than manufacturers' best case schedules assume. We recommend a flush every twelve months in this area. Units that get it routinely pass twenty years; units that never get it often fail inside eight.
Gas Line Sizing Is the Real Cost
A tankless unit can draw far more gas at peak than the tank it replaces. Many Lawrenceville homes need the gas line upsized from the meter to make that work safely. Any quote that skips this step is not a complete quote, and we will tell you upfront if your home needs it.
Right Sizing for Georgia Winters
Sizing depends on temperature rise, and incoming groundwater is far colder in January than in July. We size for the winter case so your tankless unit still delivers full flow on the coldest morning, not just in mild weather.
Brands and Parts Availability
We work on Rinnai, Navien, Rheem, Noritz, and Takagi. Parts for these brands are readily available in metro Atlanta, which keeps repair turnaround short compared with less common imports that can leave you waiting a week for a board.
Why Choose Pro Plumber Lawrenceville?
Why tankless work needs a specialist
Sized on Real Numbers
Flow rate and winter temperature rise, not a rule of thumb that leaves you short in January.
Gas & Venting Done Right
Correct gas line sizing and sealed combustion venting, the two things most commonly done wrong.
Descaling Included
We set you up on an annual flush schedule that protects both output and your warranty.
We Service What We Sell
Ongoing repair and maintenance from the same team, including units installed by someone else.
Frequently Asked Questions
Common questions about tankless water heaters in Lawrenceville, GA.
Tankless installation in Lawrenceville typically runs $3,000 to $5,500 installed, depending on whether the gas line needs upsizing and how the venting has to be routed. A straight replacement of an existing tankless unit costs less. We give a firm written quote after seeing the gas supply and vent path.
It is worth it if you regularly run out of hot water, want the closet or garage space back, or plan to stay in the home long enough to recover the higher install cost through lower energy use and a twenty year lifespan. If you are moving in two years and your current tank works, it usually is not. We will tell you which case you are in.
In Gwinnett County we recommend every twelve months because of local mineral content. Descaling clears scale from the heat exchanger, restores full flow and temperature, and is generally required to keep the manufacturer warranty valid. Skipping it is the single most common reason tankless units fail early.
That is the cold water sandwich, and it usually comes from scale buildup, a failing flow sensor, or a unit that is undersized for simultaneous demand. It can also happen when short draws cycle the burner on and off. We diagnose which of those it is rather than just recommending a replacement.
Yes, and it is a common upgrade in Lawrenceville. The conversion usually involves upsizing the gas line, installing new sealed combustion venting, and adding condensate drainage. Those steps are what separate a proper conversion from a cheap quote that will underperform or fail inspection.
Yes. We service Rinnai, Navien, Rheem, Noritz, and Takagi regardless of who installed them, including descaling, error code diagnosis, and part replacement. Call (770) 285-5619 with the brand and error code and we can often narrow the fault before arriving.
Related Plumbing Services
Complete plumbing solutions for Lawrenceville homeowners.
Thinking About Going Tankless?
Get an honest assessment of whether tankless suits your Lawrenceville home, including the gas line work most quotes leave out.