Will a tankless unit really never run out of hot water?

It heats water as you use it rather than storing a limited supply, so as long as it is sized correctly for your home it will keep up with normal, and even back-to-back, use.

Can you install tankless in a home that currently has a tank?

Yes, this is one of our most common installations. It may require some venting and gas line adjustments, which we will assess and quote upfront.

How often does a tankless water heater need maintenance?

We recommend a flush and inspection once a year, especially in areas with hard water, to keep it running efficiently and protect the warranty.

The Dr Rooter team at their Lexington, SC warehouse

Dr Rooter technician arriving at a customer's home

Dr Rooter technician running a pressure test

Dr Rooter technician locating an underground line

Dr Rooter technician using leak detection equipment

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Tankless Water Heaters in Columbia, SC

Tankless water heaters deliver hot water on demand instead of storing and reheating a tank full all day, which means lower energy bills and a water heater that never runs out mid-shower.

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Local to Columbia

What Columbia Homeowners Should Know

Columbia Water supplies roughly 375,000 customers across the capital and a good part of the surrounding Midlands, Dr Rooter's own service area included, since several of the smaller towns we work in buy their water wholesale from Columbia. That system came close to failing in October 2015, when record rainfall breached the levee at the Columbia Canal, the channel that feeds the city's water treatment plant, forcing an emergency rock dam and backup pumps to keep the taps running for the region. The full repair of that breach is still being finished today, a decade later, alongside new projects meant to add a backup river intake so the same kind of failure can't threaten supply again. Inside individual homes, the age split is just as real: century-old housing near downtown and the university still runs on original cast iron and galvanized plumbing, while the newer apartments and subdivisions ringing the city are built on PVC and PEX.

Our trucks already run routes through Columbia every week, so a licensed technician is never far away when you need tankless water heaters.

What's Included

What You Get With Tankless Water Heaters in Columbia

Endless hot water, no more running out during back-to-back showers

Smaller footprint that frees up space in your utility area

Typically lasts longer than a traditional tank water heater

Installation, replacement and annual maintenance

Call (803) 761-9935(803) 761-9935

Common Issues

Common Tankless Water Heater Issues in Columbia

No Hot Water

This is often caused by a gas supply issue, an ignition failure or a tripped breaker.

Inconsistent Water Temperature

Mineral buildup or a unit sized too small for your household can cause temperature swings.

Error Codes on the Display

Modern tankless units display error codes that point us directly to the issue.

Mineral Scale Buildup

Hard water can build up scale inside the unit over time, reducing efficiency.

Venting Problems

Improper venting can cause performance issues and is a safety concern we check first.

Reduced Flow Rate

A drop in flow can mean the unit needs a routine flush or an internal component is failing.

How It Works

Getting Help Is Simple

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Call or Book Online

Tell us what's going on. We'll get you on the schedule, often the same day.

Call (803) 761-9935(803) 761-9935

We Diagnose the Problem

Your technician arrives on time, inspects the issue and walks you through the fix and the price before starting.

We Fix It Right

We complete the repair, clean up after ourselves and make sure everything works before we leave.

Common Questions

Tankless Water Heaters FAQs

For most households, yes over time, since it uses less energy than keeping a full tank hot around the clock. We can walk through the numbers for your specific household size and usage.