Shield Plumbing installs tankless water heaters in homes across Kannapolis, Concord, Mooresville and Harrisburg. We size the unit to your household, check your gas line and venting, and give you an estimate before any work starts.
A tankless water heater heats water only when you open a hot tap, so it does not run out the way a tank can. Whether it suits your home depends on how many showers run at once, your gas supply and where the unit can vent. We check all three before you decide.
These are the most common reasons homeowners ask us about going tankless.
Thinking about switching to a tankless water heater? Call us and we will talk through your home and what it needs. Call (980) 980-9219
A tank water heater keeps 40 or 50 gallons hot all day, then runs out when the family showers back to back. A tankless unit works differently. It heats water as it flows through, so the supply keeps going. The switch takes planning, because the unit needs the right gas line, vent and water connections.
| Job | Typical time |
|---|---|
| Tankless replacing tankless | Half a dayTypical when gas, vent and water lines already fit. |
| Tank to tankless conversion | 1 full dayOften needs a new vent and a larger gas line. |
| Conversion with gas line upgrade | 1 to 2 daysDepends on the run from the meter to the unit. |
| Tankless flush and service | 1 to 2 hoursClears mineral scale from the heat exchanger. |
Tankless installation cost depends mostly on what your home already has. Swapping one tankless unit for another is the simplest job. Converting from a tank often means a bigger gas line and a new vent. You get an estimate before any work starts, with each part of the job explained.
| Factor | How it affects the price |
|---|---|
| Unit size | Larger homes with more bathrooms need a higher-output unit. |
| Gas or electric | Gas units need proper gas supply; electric units may need panel upgrades. |
| Gas line size | Many tank-era gas lines are too small and must be upsized. |
| Venting | A new vent through a wall or roof adds labor and parts. |
| Location change | Moving the heater to a new spot means new water and gas runs. |
| Permit | Water heater work often needs a permit from the county. |
We count bathrooms and peak use to choose a unit that keeps up.
We check the gas line, vent route and water supply before quoting.
We remove the old heater, mount the new unit, and connect gas, water, venting and power.
We test for gas leaks, run the hot taps and show you the controls.
Call and tell us what is going on. You get an estimate before any work starts.
Many larger homes in Mooresville and Harrisburg have three or more bathrooms and busy mornings. Those households are where tank water heaters most often run short. A properly sized tankless unit keeps hot water flowing through back-to-back showers and a running dishwasher.
Older homes in Kannapolis and Salisbury can be harder to convert. The gas line was often sized for a small tank, and the old vent may not suit a tankless unit. We check those first, so you know the full scope before deciding. Rural homes on wells may also need a filter to limit scale.
It can be, especially if your hot water runs out during busy mornings or your tank is near the end of its life. The answer depends on your gas supply, venting and how many showers run at once. A plumber can check those and give you a clear comparison.
Usually, yes. Most homes can switch, but the job is bigger than a tank swap. A tankless unit often needs a larger gas line, a new vent and new water connections. A plumber checks your home first and explains what the conversion would involve.
Common causes are mineral scale inside the unit, a unit too small for the demand, or a gas supply that cannot keep up. Low flow at one tap can also stop the burner from firing. A flush and a gas check often find the cause.
A tankless unit often lasts longer than a tank, many reaching 15 to 20 years with regular care. The key is flushing out mineral scale, usually once a year. Homes on well water may need it more often. Skipping maintenance shortens the life of the heat exchanger, the part that heats the water.
It will keep heating water as long as the demand stays within what the unit can handle. If too many taps run at once, the water may cool. That is why sizing matters. We count your fixtures and typical use, then choose a unit with enough output for your home.
Often, yes. Gas tankless units burn much more gas while running than a tank heater does. Many homes have a gas line sized for the old tank. We measure the line from the meter to the unit and tell you whether it needs upsizing before you commit.
Water heater installation often needs a permit in North Carolina, especially when gas lines or venting change. Requirements vary, so check with your county building inspections office for your address. When we give you an estimate, we will tell you whether we expect a permit and how it affects timing.
Most makers recommend a flush about once a year. Flushing pushes a cleaning solution through the unit to dissolve mineral scale. Homes on hard or well water may need it more often. A unit that shows error codes or runs hot then cold is often overdue for a flush.
Often it can, which keeps the job simpler. The new unit hangs on the wall where the tank stood. The spot still needs a safe vent route and room for service. If the old location will not work, we explain the options before quoting.
Call to describe the problem. You get a clear plan and an estimate before any work starts.
