New Construction Plumbing in Dunwoody, GA
On a new Dunwoody home, the underground plumbing should be tested and checked while it is still exposed, before any backfill; photos are a record, not a substitute. Concrete, grading and plumbing crews need a schedule that leaves room for that check.
The costliest mistake in new construction plumbing is rarely a bad joint. It is a good joint that got buried before anyone inspected it. That is why the underground stage deserves its own slot on the schedule.
Why underground pipe is checked before it is covered
Underground plumbing is tested and checked once the trench is open and the pipe is in, and before any fill goes back. A photo can supplement that record but cannot show whether a joint is seated or a line holds its slope, so the pipe should be physically visible in the trench when the check is made.
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: the pipe has to be checked before it is covered.
A schedule that protects testing time
- Lay and test early. Finish the underground drains and service lines a few days before the planned pour, not the afternoon before.
- Schedule the check once the test holds. Leave room to reschedule if the first slot is missed.
- Tell the other trades the date. Concrete and grading crews can plan around a known check instead of discovering it.
- Protect the open trench. Keep equipment off it, divert runoff so rain does not wash out the bedding, and keep homeowners out of excavations; the qualified crew must assess conditions and provide appropriate protection before any work inside.
- Backfill only after the test has held and the pipe has been checked. 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.
If something was covered too soon
When a section of pipe is buried before inspection, it has to be uncovered to be checked, 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 confirms the underground is ready to cover?
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 that the underground is cleared before they move in. A missed message costs as much time as a missed check.
What if rain fills the trench before the check?
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 checking it short reduces the risk.
Does every buried line need its own check?
Each buried section needs the specified testing and completion checks while it is exposed; several sections can sometimes be checked during 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 coordinate the underground layout, testing and completion checks with the planned concrete work.