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. Some plastic piping manufacturers prohibit testing their pipe with compressed air. 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 check for visible debris and standing water that may suggest low spots; exact grade requires appropriate measurements before anyone moves in.

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 handover, if something still drips

Testing can reveal leaks under the test conditions, 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 only then is the stage cleared to be covered. 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 test has held for its full period and the exposed work has been checked and recorded. Closing walls early risks opening them again. Once the stage is cleared, 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.

Planning the plumbing tests

Tests and checks 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.