Leak Detection in Dixie

Last reviewed and updated: 2026-09-28

Dixie is one of Marietta's long-established neighborhoods. In this part of the city the plumbing question is usually about age rather than anything exotic: what material was standard when the house was built, how many times it has been repaired since, and whether the water utility is the city or the county.

The practical starting point is the same everywhere: confirm the leak exists at the meter, then narrow it to inside or outside the house before anyone opens anything.

Older housing, older pipe

In Marietta's established neighborhoods a lot of original plumbing is still in service, and it fails in predictable ways.

Galvanized steel corrodes from the inside, progressively narrowing the bore until pressure drops noticeably, and then it perforates. Falling pressure across the whole house is covered under sudden low water pressure. Low pressure in original galvanized pipe is a warning, not just an inconvenience.

Cast iron drains crack and separate at the joints, which is why older homes often present as a recurring drain problem rather than an obvious leak.

Junctions between materials matter as much as the materials themselves. Where a partial repipe joined copper to galvanized steel, dielectric corrosion attacks that connection, so leaks in these houses often appear exactly where earlier work was done.

Freeze damage and winter failures

A hard Marietta freeze reliably produces a run of burst-pipe calls, and the pattern is consistent.

The vulnerable runs are the ones in unconditioned space: crawlspaces, garages, exterior walls, attics and outdoor hose bibs. Water expands as it freezes, splits the pipe, and then does nothing at all until the thaw, which is when the damage actually appears, often while nobody is home. Water actively escaping is an emergency: close the main shut-off first.

Before winter, insulate exposed runs, seal crawlspace vents, disconnect hose pipes and know where your main shut-off valve is and that it actually turns. During a hard freeze, let a tap drip and open cabinet doors under sinks on exterior walls.

When the stain is nowhere near the leak

Water follows the path of least resistance. It runs along the top of a joist, down the outside of a pipe, across a header and out through a light fitting, so the wet patch on your ceiling is rarely below the thing that is actually leaking.

That is why opening the wall under the stain is a coin toss, and why concealed leaks are mapped before anything is opened. Moisture meters read through finished surfaces to show how far the water has spread and which direction it traveled. Thermal imaging picks up the temperature difference a wet cavity or a hot water line creates. Acoustic equipment pinpoints the escape point.

Timing narrows it further: a leak that runs constantly is a pressurized supply line, while one that only appears after a shower or a washing-machine cycle is a drain.

Supply leak or drain leak: the timing test

One observation you can make yourself narrows the problem in half, and it costs nothing.

A supply line is pressurized all the time, so a supply leak runs constantly, day and night, whether anyone is home or not. A drain line only carries water while something is draining, so a drain leak appears in the minutes after a shower, a bath, a dishwasher or a washing-machine cycle, and then stops.

That distinction decides which equipment is used. Pressurized leaks are found acoustically, by listening for the hiss of escaping water through concrete or soil. Drain leaks make almost no sound at all, so they are diagnosed with a camera inspection, smoke testing or a hydrostatic test instead. Tell us which pattern you are seeing and the visit gets considerably shorter.

Which water utility bills you here

Billing is mixed across this part of Marietta. Some addresses fall inside the City of Marietta utility service area and are billed by Marietta Power & Water; others are served by Cobb County Water System. They run separate leak credit processes with separate paperwork, so check the utility name printed on your bill before applying for a credit.

Local notes

In housing of this age the first sign of trouble is usually pressure rather than water. Worth buying a pressure gauge that screws onto an outside tap: it costs very little and it tells you in one minute whether you are looking at a leak, corroded supply pipe, or a pressure-reducing valve that has failed.

Frequently asked questions