New Construction Plumbing in College Park, GA

Every stage of new construction plumbing ends the same way: the pipe is about to vanish behind concrete, soil or drywall, and somebody has to show it does not leak first. On a single house that proof happens three or four times; on a duplex or a pair of attached homes, it happens for each unit.

Testing the drain, waste and vent system

Drain and vent piping carries no pressure in daily use, yet it is tested as though it did. The usual method is to plug the openings and fill the section with water so every joint sits under a column of water, then watch the level. An air test, with the system pressurized and a gauge monitored, is the alternative when water is impractical. The test is held for as long as the code and the inspector require, and any drop means hunting down the joint that let go. On every new construction plumbing job, that test is repeated at each stage from the first trench onward.

Testing the supply lines

Supply piping lives under pressure every day, so its test looks for the slow weep that would otherwise appear as a ceiling stain months later. The lines are capped, pressurized and watched on a gauge. Plastic piping such as PEX and CPVC comes with the manufacturer's instructions on testing, and some manufacturers advise against testing their pipe with air, so the method is chosen with the material in mind.

Testing the building sewer and water service

Outdoors, the building sewer is tested while the trench is still open, and the water service is checked for leaks before backfill. A line that passes in an open trench and then sags under careless backfill can still fail later, so bedding and the first layer of fill deserve the same care as the joints. Some builders also order a sewer camera inspection after backfill to confirm the line is clear and free of low spots before anyone moves in.

How College Park handles permits and inspections

The city's Department of Building and Inspections issues plumbing permits and handles plan review, permitting and inspection requests online through SagesGov. Under the city code, plumbing is not installed, altered or repaired until a formal permit has been issued, and inspections are made by the building official or authorized representatives rather than by the plumber or utility contractor who did the water and sewer work. In practice, that pipe has to stay exposed until the city's inspector has seen it.

Testing more than one unit

• Test each unit's systems separately so a failure points to one place, not two.
• Label shutoffs and stubs by unit before drywall; on attached homes it is easy to cross lines between kitchens that share a wall.
• Confirm each unit has the accessible main shutoff and water heater location the plans call for.
• Keep a simple log of test dates and results for every unit and stage.

After the final, if something still drips

Testing catches nearly everything, but a fitting bumped by a cabinet installer or a nail driven through a line after inspection can still leak. Watch ceilings under bathrooms, the base of cabinets and the water meter during the first weeks. If the meter creeps with every fixture off, our water leak detection team can locate the source without opening walls at random.

College Park testing and inspection questions

What happens if a pipe fails its test?

The crew finds the leak, repairs the joint or fitting and runs the test again until the system holds, and the inspection is then booked for the passing system. A failed test is not unusual; it is exactly why testing happens while everything is still exposed. Fixing a leak now takes minutes, while finding the same leak behind finished drywall takes far longer.

Can the walls be closed as soon as the test holds?

Not until the inspector has approved that stage. A test that holds on the plumber's gauge is a good sign, but the city's sign-off is what counts, and closing walls before it risks opening them again. Once the stage is approved, a quick walk before insulation catches stubs or lines damaged by other trades.

Is a duplex plumbed differently from a single house?

The stages and tests are the same, but there are two complete systems to lay out, test and inspect. Pipe penetrations through the shared wall need proper firestopping, and each unit typically gets its own shutoff and water heater. The plans should show how each unit's drains and supply lines stay distinct, which keeps future service work simple.

Lining up your inspections

Tests and inspection stops are easiest to plan before the first trench. For a new home or duplex in College Park, call Alpha at (404) 409-4448, and we will map them against your construction schedule.