Tankless Water Heater Repair & Installation in Rex, GA

Brown, cloudy or strange-smelling hot water makes most people suspect the water heater. With a tankless water heater, the unit itself is a less frequent culprit than a tank would be, because it stores almost no water and most tankless designs have no anode rod or sediment-filled tank bottom. That changes where to look. For a household in Rex, a few simple comparisons usually point to the heater, the house piping or the water supply before anyone opens a cabinet. Tank-style heaters are covered in our water heater overview for the state.

Start by comparing hot and cold

• Both hot and cold are affected: the source is upstream of the heater, such as recent work on a water main, the service line to the house or the home's main piping.
• Only hot water is affected: look at the heater, any buffer tank or recirculation loop, and the hot piping.
• Only one fixture: the problem is in that fixture or its branch line.

What colors and particles usually mean

Brown, orange or rusty water typically comes from iron: corroding galvanized or steel pipe, or sediment stirred up in the mains. Cloudy or milky water that clears in a glass from the bottom up is dissolved air coming out of solution, not a heater fault. White or tan flakes are usually mineral scale broken loose from the heat exchanger or pipes, often after a descaling or a pressure surge. Black specks tend to be rubber from aging washers, valve seats or flexible supply hoses. A blue-green tint or staining suggests copper pipe corrosion linked to water chemistry, which deserves a closer look at the piping.

Sorting out odors

A rotten-egg smell from a tank heater is often tied to its anode rod reacting with sulfur-related bacteria. Since most tankless units have no anode, that smell usually starts elsewhere. Fill a glass at the tap, step away from the sink and smell it there; if the glass smells fine, the odor is coming from the drain, not the water. A chlorine smell in both hot and cold usually reflects municipal treatment, and heating releases it more noticeably. A musty odor at a bathroom that sits unused for weeks points to stagnant water in its lines. For a new and persistent change, the water utility can say whether work or treatment changes are under way.

When the heater is part of the story

• Scale flakes after a descaling, which flush out with running water.
• A torn or missing inlet screen that lets debris into the unit and beyond.
• A buffer tank or recirculation loop holding stagnant water in a lightly used home.
• Corrosion inside the cabinet, usually alongside a leak or codes.

Fixes, matched to the source

Many cases end with flushing the hot lines, rinsing the heater's inlet screen and cleaning aerators. Where rusty water comes from corroded galvanized pipe, no heater work will clear it for long, and replacing the affected lines through our whole house repiping service is the lasting answer. Dirty water at every tap after a break or repair on the pipe from the meter falls under main water line repair. Recurring sediment can also justify a whole-house filter ahead of the heater.

Permits when piping is replaced

For a Rex address, check with Clayton County, or with whichever government serves the property, before piping work begins. The county's building permit section handles plumbing permits for home repairs and remodels, and under the county code fixing a leak generally needs no permit, while replacing a concealed water pipe with new material does. That matters if discolored water traces back to corroded pipe inside walls.

Discolored water questions from Rex homeowners

Why is my hot water brown when my cold water is clear?

The cause sits on the hot side. Corroding galvanized hot lines are a common source, since heat speeds up that corrosion. Debris loosened inside the heater after service, a damaged inlet screen, or stagnant water in a buffer tank or recirculation loop can also tint the water. Running the hot tap for a few minutes and noting whether it clears helps narrow it down.

Can a tankless water heater cause a rotten egg smell?

It is less likely than with a tank, because most tankless units lack the anode rod usually involved. Check whether cold water smells too and whether the odor comes from the drain instead of the water. If it appears only in hot water, inspect the heater, any buffer tank and any recirculation loop.

Are white flakes in hot water a sign my tankless heater is failing?

Usually not. Flakes are typically mineral scale freed from the heat exchanger or pipes, especially after descaling or a sudden change in pressure. They should taper off as the lines flush. Flakes that keep appearing point to hard water building scale faster than it is removed, which calls for more frequent descaling or water treatment rather than a new heater.

Clues worth noting

Note whether the problem is in hot, cold or both, which fixtures show it, when it started and whether any water work happened nearby.

Hot water in Rex that looks or smells wrong? Call Alpha Plumbing and Sewer at (404) 409-4448 and we will help track down where it starts.