Last reviewed and updated: 2026-09-28
Fort Hill is one of Marietta's historic Black neighborhoods, named alongside Baptist Town and Louisville in the city's historic house marker program: a program open to homes over 50 years old in those communities. Roosevelt sits immediately alongside it.
A neighborhood where much of the housing is comfortably past fifty years old is a neighborhood where original supply pipe and original drain lines are still doing the work they were installed to do in a different era.
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.
Claiming the leak credit afterwards
Once the leak is repaired, your water utility may credit part of the inflated bill, but only if you can prove what was wrong and what was done about it.
Cobb County Water System allows a partial credit once in a rolling 12-month period, applied to no more than two affected months. The county describes it as "a partial offset of the costs associated with certain plumbing failures, not to fully compensate a customer for the costs of a leak." You need your account address and number, a brief explanation of the leak, and a plumbing repair receipt, a receipt for parts, or at minimum a letter explaining what was done. Pool leaks also require the pool volume, and you keep paying the bill while the claim is processed.
Marietta Power & Water runs its own separate process for City of Marietta customers. Check the utility name on your bill to see which applies to you.
Get the paperwork before the job closes. Once the slab is repoured and the trench backfilled, the evidence is gone and the application is much harder to support.
Polybutylene: the Cobb County problem pipe
Polybutylene supply pipe was installed widely across Georgia between roughly 1978 and 1995, which covers a large share of Cobb County housing. It is gray indoors, sometimes blue for exterior runs, and often stamped PB2110.
It degrades from the inside out. Oxidants in treated municipal water attack the pipe wall and the acetal fittings, micro-fractures form internally where nobody can see them, and the pipe or fitting eventually lets go, with no weeping, no gradual drip, no warning at all. Polybutylene leak detection starts by identifying the pipe at the water heater.
That matters twice over. There are no early symptoms to act on, and a system that has produced one failure has been exposed to identical conditions everywhere else. Check at the water heater, under sinks and at the main shut-off. If you find it, the conversation is usually about the whole system rather than the single failure point.
Want the leak found before anything is opened?
Acoustic listening, thermal imaging, pressure testing and tracer gas narrow it to a few inches first, so only that area has to be touched.
Tree roots and older sewer laterals
Marietta's mature tree canopy is one of the best things about living here and one of the hardest things on its sewer laterals.
Roots seek moisture and find it escaping at the joints of older clay and cast iron pipe. Once inside, they trap solids, which is why the first symptom is usually repeated backups rather than a visible leak. Cutting the roots clears the blockage but not the defect that let them in, so they grow back.
Drain lines are not pressurized, so acoustic listening does not work on them. They are diagnosed with a camera inspection that shows the inside of the line, cracks, joint offsets, root masses, bellies where the pipe has sagged, and with smoke testing for odor sources a camera cannot see. Repeated backups on the same line point to a structural repair rather than another cleaning.
Which water utility bills you here
Neighborhoods in and immediately around the city are typically billed by Marietta Power & Water, often on a combined electric and water bill, rather than by Cobb County Water System. The two utilities run entirely separate leak credit processes, so check the utility name printed on your bill before you apply for anything, sending the application to the wrong one is a common and avoidable delay.
Local notes
The historic house marker program, run with the Marietta History Center and Cobb Landmarks, recognizes homes over 50 years old in Fort Hill, Baptist Town, Louisville and other historic Black neighborhoods. If your home carries a marker, that age is also a useful starting point for understanding the plumbing: it tells you roughly which materials were standard when the house was built.
Frequently asked questions
How old are homes in Fort Hill and Roosevelt?
Much of the housing is over fifty years old, the city's historic house marker program for Fort Hill and Marietta's other historic Black neighborhoods is open specifically to homes past that age. For plumbing, that puts galvanized steel supply and cast iron drains firmly in range.
My water pressure has dropped. Is that a leak?
It can be, but in older housing it is just as often corroded galvanized steel narrowing the bore from the inside. A pressure gauge on an outside tap and a water meter test together distinguish the two: a leak shows on the meter, corrosion does not.
Is my home billed by the city or the county here?
Neighborhoods in and immediately around the city are typically billed by Marietta Power & Water. Confirm from the utility name printed on your bill, because the leak credit process differs from Cobb County's.