ServicesTankless Water Heaters
Tankless Water Heater Installation in Nashville
We put in tankless water heaters, gas or electric, and match the fuel supply, vent pipe and wiring to the unit you choose. Before we leave, every joint is leak-tested and the burner is combustion-checked, so you get steady hot water without adding risk to your home.
More Than Swapping One Heater for Another
A tankless heater fires only when a tap opens, heating water as it passes through a heat exchanger. To do that, a gas unit can draw several times the fuel of the 40-gallon tank it replaces. That is why the install matters as much as the unit you choose.
Most problems we see with tankless systems trace back to the setup: a half-inch gas line starving the burner, a vent run that is too long, or no service valves for descaling. We check each of those before we quote, and we explain why a change is needed if one is.
What Our Installation Includes
- 01
Load and flow sizing
We count your fixtures and estimate peak demand in gallons per minute, then pick a unit that keeps up when the shower and the dishwasher run together.
- 02
Gas line evaluation
We measure pipe size and run length back to the meter. If the existing line cannot carry the unit's full BTU input, we upsize it so the burner does not starve and the flame burns clean.
- 03
Sealed, code-correct venting
Non-condensing units need stainless steel vent pipe. Condensing units can vent through PVC or polypropylene and need a condensate drain with a neutralizer. We follow the manufacturer's length limits and clearances to windows and doors.
- 04
Electrical for electric models
Electric tankless units often need multiple dedicated double-pole breakers. We check your panel capacity first and tell you plainly if it cannot support one.
- 05
Isolation valves and relief valve
We install service valves so the heat exchanger can be flushed of scale, plus a pressure relief valve piped to a safe discharge point.
- 06
Removal of the old tank
We drain the old heater, cap its connections and haul it away.
Questions about Tankless Water Heaters?
Call(615) 560-9798Signs It Is Time to Go Tankless
Your tank is past 10 years
Steel tanks corrode from the inside once the anode rod is spent. Replacing before failure means you choose the next system on your schedule.
Hot water runs out mid-shower
A tank holds a fixed volume. A properly sized tankless unit keeps heating as long as water flows.
Rumbling or popping sounds
Sediment hardened on the tank bottom makes the burner work harder and stresses the steel. Hard water from the area's limestone speeds that buildup.
Rusty hot water or moisture at the base
Rust in hot water only, or dampness under the tank, points to an inner lining giving out. If the tank is actively leaking, our 24/7 emergency plumbing service can shut it down safely.
You need the space back
A wall-mounted tankless unit frees the floor a tank occupied in a closet, garage or basement.
How Install Day Runs
- 1
Shut down safely
We turn off gas or power and water to the old heater, drain it and confirm there is no residual pressure before disconnecting anything.
- 2
Mount and pipe the unit
The new heater goes on the wall with proper clearances. We connect hot and cold lines through the isolation valves and add the relief valve.
- 3
Gas, vent and power
We run or upsize the gas line, install the vent and condensate drain, and make electrical connections. A unit in an unheated garage or on an exterior wall gets freeze protection, since winter cold snaps can crack a heat exchanger.
- 4
Test before we leave
We pressure-test new gas piping, check every joint for leaks, measure combustion and look for carbon monoxide at the vent and in the room. Then we set the temperature and show you how the descaling valves work.
What Moves the Price
Two homes can buy the same tankless model and end up with very different totals. The gap almost always comes from what the house needs to support the unit. Your free estimate breaks out each item so you can see where the cost comes from. We offer financing options, and we take cash as well as all major credit cards.
- Gas line upgrades
- A short run near the meter may be fine as it is. A long run on small pipe often has to be replaced with larger pipe so the burner gets enough fuel.
- Venting route
- A straight path through an exterior wall is simpler than routing through an attic or around framing.
- Gas versus electric
- Electric units cost less to vent but may require panel work. Gas units need venting and an adequate fuel supply.
- Unit size and type
- Higher flow ratings and condensing designs cost more up front but suit larger homes and run more efficiently.
- Permits and location
- We pull the plumbing and gas permits your jurisdiction requires. Tight closets or crawlspace access can add labor time.
Tankless Water Heater Questions
Will a tankless heater work during a power outage?
Gas tankless units still need electricity for their controls, fan and ignition, so they stop when the power goes out. A tank with a standing pilot may keep working. If outages concern you, we can talk through backup options at your estimate.
Can my existing gas line handle a tankless unit?
Often it cannot without changes. Many homes have a half-inch line sized for a tank heater, while tankless units need far more fuel at full fire. We measure the pipe and run length and tell you exactly what is needed.
How much maintenance does it need?
Most units should have the heat exchanger flushed to remove mineral scale roughly every twelve months, and hard water shortens that interval. The isolation valves we install let a pump circulate the cleaning mix without taking the unit apart. Rinsing the inlet filter screen is part of the same routine.
Why does it take a moment for hot water to arrive?
The heater still has to push hot water through the pipes already full of cold water, just as a tank does. The unit also needs a second or two to fire. A recirculation setup can shorten that wait.
How long does installation take?
A straightforward replacement usually takes most of a day. Gas line upsizing, new vent routing or panel work can extend it, and we tell you during the estimate which applies to your home.
Get a Clear Plan for Your Tankless Install
We will look at your gas supply, venting route and hot water demand, then explain what the job needs and why. Serving Nashville, Brentwood, Mount Juliet and nearby towns.