Marietta, Georgia
The Plumber Marietta Owners Want Is the One Who Read the Test Conditions
Cities publish permit rules. Almost none of them publish the test the inspector will run when they arrive. Marietta does, on the plumbing permits page itself, in feet and in pounds.
At a plumbing rough inspection, the city states that water is to be on the drainage waste system and supply, that water shall be to a ten foot head above the highest fixture in order to emulate backpressure, and that water or air on the supply loop shall be a minimum of 50 pounds. Those are not guidelines. They are the pass mark, written down in advance.
That single detail tells you a lot about how work is judged here, and it makes a failed rough inspection in this city harder to excuse than almost anywhere else. Below is what else the city publishes, including one rule that quietly changes what your water heater needs.
All Work Means All Work
The Marietta Permit Trigger, and the Rule That Follows a New Meter
The city states the trigger without hedging. A plumbing permit is required for all work done on a plumbing system, and it enumerates what that includes: water supply, sewer, grease traps, gas line and water heater. There is no repair carve out and no like for like exemption in that sentence.
Where that sits on the spectrum. This is the maximalist end, alongside Atlanta down the road, which requires a permit to install, repair or replace any plumbing equipment. Several cities we write about go the other way entirely and exempt a same location water heater swap. Two Georgia cities twenty miles apart both landed on all work, which is worth knowing before somebody assumes a small job is not worth declaring.
And the rule that catches people after the meter goes in. The city states that it will install backflow devices for all new commercial and new residential meter installations, and that water services require thermal expansion for any new commercial, new residential and retrofits of existing systems. Read those two sentences together, because the second one is a consequence of the first, and it applies to existing houses as well as new ones.
Here is the chain in plain terms. A backflow device stops water flowing back toward the main. Once one is fitted, the plumbing in the building is a closed system. Water expands when it is heated, and in a closed system that expansion has nowhere to go, so pressure climbs every time the heater fires. The temperature and pressure relief valve then does its job and lets some out, which looks exactly like a faulty valve and is not one.
The fix is a thermal expansion tank or an equivalent control, correctly sized and correctly charged to the incoming pressure. It is a small component and it is routinely left out, and leaving it out shortens the life of a water heater, of the relief valve and of every flexible connector in the house. If your meter has been replaced and your relief valve has started weeping, that is the conversation to have.
A Result Worth Publishing
Marietta Looked for Lead Service Lines and Did Not Find Any
The city states that Marietta Water has completed a comprehensive service line inventory for all water connections in its system, conducted using a combination of historical records and field inspections, and that no lead service lines were found within the Marietta Water service area. It also publishes an address lookup so an individual property can be checked.
That is worth putting next to the opposite result. In Chicago, a city page we built earlier in this project, the same federal rule produced a count of almost 400,000 lead service lines and a legal obligation to replace them. Same requirement, same year, opposite findings, and the difference is simply when and how each city was plumbed.
For a Marietta household the practical effect is that one common worry can be set down, at least for the service line. It does not mean there is no lead anywhere in the building. Older solder joints, older brass fittings and older fixtures are separate questions from the service line, and they sit on the property owner side of the boundary in any case.
That boundary is published too, and it is the cleanest statement of it we have seen. Marietta Water maintains the portion of the service line running from the water main to the meter. From the meter to the home or business, including any piping inside the building, the service line is the responsibility of the property owner. If you want one sentence to settle an argument about who pays, that is it.
Buy It Finished
Marietta Does Not Treat Its Own Water, and That Is a Deliberate Choice
Marietta Water has been part of the community for more than a century, and it describes its job as distributing safe drinking water and protecting the environment during wastewater collection. What it does not do is treat. The city purchases finished water from the Cobb County-Marietta Water Authority, a regional public utility founded in 1951, whose two sources are the Chattahoochee River and Lake Allatoona.
Buying finished water is one of three positions cities take on the same question, and we have now written about all three. Fort Worth buys raw water from a district and treats it itself, then resells it to two dozen other cities. Anaheim buys raw deliberately, because raw water costs less than treated and it would rather run its own plant. Marietta buys the finished product and concentrates on the pipes.
What that means for a household is mostly about who to ask. Questions about pressure, about a meter, about a leak in the street or about the sewer go to Marietta Water. Questions about treatment chemistry, about what is in the water and about the source belong to the regional authority, and a water quality question passed to the wrong body takes longer than it should.
The Chattahoochee itself has a much bigger story attached to it, and that story belongs to the Atlanta page, where a river running along the edge of a city rather than through it is the lead subject. Here it is simply one of two sources feeding an authority that sells Marietta its water.
How the Department Works
Permits, Inspections and the Things Worth Knowing in Advance
Marietta has moved permitting online, and the city describes the process plainly. You register on its permitting system, select the items that apply to the project, and the system calculates the total. After payment the city asks for one to two business days for processing, after which the permit becomes visible in your account. The city notes that no visit to the office is necessary.
Inspections went the other way. The city states that it began phasing out virtual inspections on 1 November 2024 and that all inspections are now performed in person. For HVAC and water heater replacement it asks specifically that the inspection is scheduled by the contractor and that the homeowner is available to let the inspector into the premises.
That last point is the one that costs people time. On a water heater change out, someone has to be at the property. If the contractor books an inspection and nobody is home, the visit is wasted, and on a job where the water has been off, a wasted visit is a wasted day. Agree who is opening the door before the slot is booked.
Grease traps have their own route. The city says its department performs the connection and cover up inspection, and directs specific questions to the water and sewer side of the utility. On a restaurant fit out, that is two different conversations rather than one, and knowing that in advance avoids a job stalling between them.
A fee schedule for plumbing permits is published separately on the city documents page. We are not quoting a figure here because we did not open that document, and a stale fee is worse than no fee. Ask when you register, since the system totals it for you anyway.
Ground and Houses
Four Building Eras Within a Few Miles of the Square
Marietta is old by the standards of its region and it kept growing through every era since, which means the plumbing you find depends almost entirely on the street. Around the Square and the older avenues there is genuinely old housing with crawlspaces, cast iron drainage and, in places, galvanised supply that has been quietly closing up for decades.
Galvanised pipe fails in a specific and recognisable way, and it is worth naming because it is so often misdiagnosed. Pressure falls gradually rather than suddenly, hot water suffers before cold, and the first cup of water in the morning carries rust colour. None of that is a leak, and none of it is fixed by replacing a fixture. It is the inside diameter of the pipe shrinking.
The mid century expansion mixed slab and crawlspace construction across the same neighbourhoods, sometimes on the same street, which changes where a leak can hide and how it is found. A slab leak announces itself with a warm floor or an unexplained bill. A crawlspace leak announces itself with damp, smell and eventually with joists that are softer than they should be.
Georgia red clay sits under most of it. Clay holds water, moves with the seasons and is hard on shallow buried drainage, which is why root intrusion and joint separation are the routine causes of a blocked sewer here rather than anything exotic. A camera survey settles which one you have, and it settles it before anyone quotes a dig.
Where Requests Come From
Marietta Neighbourhoods and the Cities Around Them
The list below is where enquiries reach us most often, and it is not a claim about coverage.
The last several entries are deliberately not Marietta. Kennesaw, Smyrna, Acworth, Powder Springs, Austell, Roswell and Atlanta are separate municipalities with their own permitting departments and their own arrangements. Crossing one of those lines can change your permit counter and your utility in the same step.
There is a bigger trap here than the city line, and it is the postal address. A great many properties with a Marietta mailing address sit in unincorporated Cobb County rather than inside the city, which means a different permitting authority and, potentially, a different water and sewer provider. We are not going to tell you which side of that line your house is on, because it depends on the address and we would rather you checked than trusted a web page.
The practical version is simple. Before any permitted work, confirm three things: whether the property is inside the Marietta city limits, who supplies its water, and who collects its sewage. Those three answers determine every form you will fill in, and they take one phone call to establish.
What We Handle Here
Plumbing Services Across Marietta
Water heater work leads, and in this city it comes with a specific local check. Where a backflow device has been fitted at the meter, thermal expansion control is required, including on retrofits of existing systems. A replacement that ignores that produces a weeping relief valve and a shortened service life. Water heater repair covers repair and replacement, with the expansion side treated as part of the job rather than an extra.
Drain and sewer work is the other constant. Red clay, mature trees and older drainage produce root intrusion and separated joints, which look identical to a simple blockage until somebody puts a camera down. Drain cleaning handles the clearable end and sewer line repair the structural end.
Grease and scale build up on kitchen and commercial lines respond to hydro jetting rather than to a cable, which punches a hole through a restriction and leaves the rest in place. On restaurant work around the Square and the commercial corridors, that is usually the right first answer.
Leaks in older housing split by construction type. A slab leak needs locating before concrete is opened, a crawlspace leak needs finding before the timber suffers, and a galvanised supply that has closed up is neither. Leak detection covers the first two and an honest conversation covers the third.
Commercial work runs along Franklin Gateway, Delk Road and the corridors toward the interstate, where grease traps, backflow assemblies and the citys own connection and cover up inspection all apply. Commercial plumbing covers that side. Emergency plumbing covers what to do first when water is moving and you cannot stop it. We publish no response time for Marietta, because a number written for a web page helps nobody standing in water.
Marietta Plumbing Questions, Answered Straight
What Marietta households actually ask about permits, inspection test pressures, thermal expansion, lead service lines and who owns which pipe.
The city states that a plumbing permit is required for all work done on a plumbing system, and it lists water supply, sewer, grease traps, gas line and water heater as examples. There is no repair carve out in that sentence, which puts Marietta at the strict end of the range alongside Atlanta. Permits are applied for through the city online system, which totals the fee for you, and the city asks for one to two business days for processing.
The city publishes it, which is unusual and genuinely useful. At the plumbing rough inspection, water is to be on the drainage waste system and supply, water shall be to a ten foot head above the highest fixture to emulate backpressure, and water or air on the supply loop shall be a minimum of 50 pounds. Those are stated as minimum requirements under the International Building Code and International Residential Code. Anyone working here should know those numbers before the inspector is booked.
Usually not. Marietta states that it installs backflow devices for all new commercial and new residential meter installations, and that water services require thermal expansion for new commercial, new residential and retrofits of existing systems. A backflow device closes the system, heated water expands with nowhere to go, pressure rises and the relief valve does exactly what it was designed to do. The answer is correctly sized and correctly charged thermal expansion control, not a new valve.
The city states that Marietta Water completed a comprehensive service line inventory for all water connections in its system, using a combination of historical records and field inspections, and that no lead service lines were found within its service area. It publishes an address level lookup so an individual property can be checked. That covers the service line specifically. Older solder, brass fittings and fixtures inside a building are separate questions.
Marietta publishes the cleanest statement of this we have seen. Marietta Water maintains the portion of the service line that runs from the water main to the meter. From the meter to the home or business, including any piping inside the building, the service line is the responsibility of the property owner. That single boundary decides who pays for most of the arguments people have about street side leaks.
Marietta does not treat its own water. It purchases finished water from the Cobb County-Marietta Water Authority, a regional public utility founded in 1951, which draws on two sources, the Chattahoochee River and Lake Allatoona. That means distribution questions go to Marietta Water and treatment or water quality questions belong to the authority. It is a different model from cities that buy raw water and run their own treatment plants.
Not necessarily, and this is the single most common local confusion. A great many properties with a Marietta postal address sit in unincorporated Cobb County outside the city limits, which can mean a different permitting authority and a different water or sewer provider. Before any permitted work, confirm whether the property is inside the city limits, who supplies the water and who collects the sewage. Those three answers decide every form you will fill in.
Ten Feet of Head, Fifty Pounds, No Surprises
Work tested to the pressures the city publishes, water heaters fitted with the thermal expansion control a closed system needs, drains surveyed before a dig is quoted, and straight answers about whether your address is inside the city at all. Tell us the cross streets and the symptom.
Sources for the rules and figures quoted on this page: the City of Marietta Plumbing Permits page and the Marietta Water Water Service Line Inventory page, together with the Marietta Water overview page for the supply arrangement. No hardness figure, fee amount or system size figure is quoted, because none was published on the pages read. Codes, fees and procedures change, so confirm them with the city before relying on them.