New Construction Plumbing in Atlanta, GA

When a new house replaces an older one, new construction plumbing starts at the property line, not at the foundation. The lot already has a sewer lateral and a water service placed and sized for a house that no longer exists, and whatever you decide about them shapes everything inside. On infill lots across Atlanta, this underground stage is where most of the surprises hide.

What the old house leaves behind

Demolition removes the structure, but the old building sewer usually stays in the ground, capped or snapped off near the former foundation. It may be clay or cast iron, it may be full of roots, and it may sit at a depth that does not suit the new floor plan. The old water line can be too small for a larger house or made of a material nobody wants to reconnect. Before anyone decides to reuse either, look at it properly. A sewer camera inspection shows the route and visible condition of the old lateral, which helps decide whether it can serve the new house; it does not measure exact slope or prove watertightness.

Reuse, repair or run new

Three paths come up most often. Reusing a sound lateral at a workable depth saves digging. Repairing one damaged section, or lining it where the pipe suits that method, can make sense when the trouble is limited, and our main sewer line repair crew takes on that kind of work. Running a new building sewer to the tap is the cleanest answer when the old pipe is deteriorated, too shallow or in the way of the new footprint, and it generally means sewer excavation across the yard. The choice affects the schedule too, because a new tie-in adds its own test and visual check.

Laying the underground plumbing

Once the service decisions are made, the crew lays the building drain and the branches for every floor-level fixture, sets sleeves where pipe passes through footings or foundation walls, with openings placed as the structural design allows, and adds cleanouts where the drain leaves the house and at changes of direction. Every line is pitched toward the exit, joints are made up, and the system is filled for its test. Nothing is backfilled or covered until the underground test holds and the exposed pipe has been checked, and bedding then goes in carefully so stones do not rest against the pipe. Rough-in, top-out and final come next, as with any new construction plumbing, but on an infill lot the underground decisions are the hard ones.

Sloped lots and basements

On a lot that falls away from the street, a basement floor can end up lower than the public sewer. Fixtures below the sewer cannot drain by gravity, so they need a sewage ejector pit and pump. Decide early whether a basement bath is part of the plan, because the pit and its discharge route are set during the underground stage, not after the floor is poured.

Questions Atlanta infill builders ask

Can the old sewer line be reused for a new house?

Sometimes. It depends on the pipe material, its condition, its depth and whether its route works with the new footprint, and a camera inspection shows the route and visible condition, while the depth is confirmed separately. A lateral in good shape at a practical depth can save time and digging, but a cracked, root-filled or shallow line is usually replaced while the yard is already open for construction.

What is checked at the underground stage?

The crew confirms that the pipe material and sizes suit the design, that lines slope correctly toward the exit, that joints and fittings are sound, and that the system holds its test, using the test method and pressure the pipe manufacturer allows, with fixtures and appliance connections isolated. Cleanouts and sleeves are visible at this point as well. While the slab area is still open, any correction is simple; after concrete, it is not.

Talk to Alpha before demolition day

Planning a new Atlanta home where another house once stood? Call us at (404) 409-4448 before demolition, while the old service lines are still easy to trace and evaluate.