New Construction Plumbing in Dunwoody, GA

The costliest mistake in new construction plumbing is rarely a bad joint. It is a good joint that got buried before anyone inspected it. Once a trench is backfilled or a basement slab is poured, there is no practical way to show an inspector what lies underneath, and the usual remedy is to dig it back up. In Dunwoody, the city's rules make that point plainly, so the underground stage deserves its own slot on the schedule.

The underground rule in Dunwoody

The city's building code provisions require the underground plumbing to be inspected once the trench is open and the pipe is in, and before any fill goes back. The city's permits and inspections FAQ is just as clear that a photo cannot stand in for an inspection. Taken together, the pipe must be physically visible in the trench when the inspector arrives.

Where the pressure to cover comes from

On a busy site, every other trade wants that trench closed. The concrete crew has a pour date for the basement floor or garage slab, the grader wants to shape the yard before the next rain, and the framer needs a clear, level work area. None of them is wrong, yet each is a reason someone might propose burying the pipe and sending pictures as proof. That shortcut does not work in Dunwoody.

A schedule that protects the inspection

1. Lay and test early. Finish the underground drains and service lines a few days before the planned pour, not the afternoon before.
2. Request the inspection once the test holds. Leave room to reschedule if the first slot is missed.
3. Tell the other trades the date. Concrete and grading crews can plan around a known inspection instead of discovering it.
4. Protect the open trench. Keep equipment off it and divert runoff so rain does not wash out the bedding.
5. Backfill only after approval. Then place bedding and fill carefully so the inspected pipe keeps its grade.

No other date on a new construction plumbing schedule is as expensive to get wrong.

Basements add a second underground stage

A house with a basement often has two layers of buried plumbing: the building sewer and service lines outside the foundation, and the drains beneath the basement slab. Each may be ready at a different time, and each has to be seen before it is covered. Basement floors also raise the question of whether any fixtures sit below the sewer and need a pumped basin, which must be decided before the slab plumbing goes in.

Who holds the permit

According to the city's permits and inspections FAQ, permits go to contractors holding a license, or to an owner who lives in the home being altered. On a new house that generally means the builder or the plumbing contractor, so settle which of them holds the plumbing permit before the underground work begins.

If something was covered too soon

When a section of pipe is buried before inspection, it has to be uncovered for the inspector, and the cost depends on what went over it: a few shovels of soil is one thing, a cured slab quite another. Digging a buried drain back out is much the same job as drain excavation at an older house, and a water service covered too early has to be exposed the way our main water line repair crew exposes a leaking line.

Underground inspection questions in Dunwoody

Who calls in the underground inspection?

Usually the plumbing contractor, since the plumber knows when the test is holding. On a new home, the builder and the plumber should agree on that in advance, along with who passes on the result, so the concrete and grading crews hear about the approval before they move in. A missed message costs as much time as a missed inspection.

What if rain fills the trench before the inspection?

Standing water can float lightweight pipe, wash out bedding and soften the trench bottom. After a storm, the crew pumps the trench, confirms the pipe still holds its grade and the joints are undisturbed, re-beds where needed and reruns the test if anything moved. Keeping the gap between laying pipe and inspection short reduces the risk.

Does every buried line need its own inspection?

Every section of underground plumbing has to be inspected before it is covered, but several sections can often be ready together and seen in one visit. Coordinating the work so the building sewer, the water service and the under-slab drains finish at the same time cuts the number of trips and the days trenches sit open.

Keep your pour date

Have a pour date on the calendar for a new Dunwoody home? Call Alpha at (404) 409-4448, and we will get the underground plumbing laid, tested and inspected before the concrete truck arrives.