Drain Repair in Dunwoody, GA

Few drain problems announce themselves like a laundry standpipe that overflows mid-cycle, spilling soapy water across the floor. When the laundry room in a Dunwoody home sits upstairs or beside finished living space, a washer drain that backs up can do damage quickly. Alpha Plumbing and Sewer handles drain repair for laundry standpipes, laundry sinks and the branch lines they empty into, from clearing a lint-packed trap to re-piping a line that cannot keep up.

Why washer drains overflow

A washing machine does not drain by gravity. Its pump pushes water out in a strong burst, and the standpipe and branch drain have to accept that flow without backing up. Several things get in the way:

• Lint and fibers build up in the trap and the first stretch of branch, gradually narrowing it.
• Soap residue from heavy detergent use coats the pipe and binds the lint.
• An undersized or short standpipe fills faster than it empties.
• A shared branch with a kitchen sink or laundry tub can carry grease or debris from the other fixture.
• A partial clog farther down the house drain shows up first at the washer, because it sends the most water at once.

Water behind the washer that is not an overflow

Not every puddle is a drain backup. A cracked drain hose, a loose hose clamp, or a hose pushed so far into the standpipe that it siphons can all leave water on the floor. Supply hoses and the valves that feed the washer are another common source, and a slow drip at a valve is a job for faucet and valve repair. Watching the drain hose and standpipe while the washer pumps out tells you which side the water is coming from.

How laundry drains are repaired

1. Clearing the branch. A cable removes lint and soap buildup from the trap and the first part of the line; for heavy buildup along a longer run, hydro jetting scours it more completely.
2. Replacing the standpipe and trap. A corroded, cracked or too-short standpipe is replaced, with the trap set at the right height for the machine.
3. Upsizing the drain. Where an older, smaller line cannot handle a modern washer's pump rate, the standpipe and branch may need larger pipe.
4. Installing a wall laundry box. A recessed box with valves and a drain opening keeps hoses tidy and protects the connections.
5. Adding a lint trap on the discharge hose or the laundry sink to catch fibers before they reach the pipe.

Protecting the room

An upstairs laundry room benefits from a drain pan under the washer, ideally piped to a drain, and from a water sensor alarm on the floor. Keep the area behind the machine clear enough to see the standpipe and hose. If an overflow has soaked the floor or the ceiling below, water restoration can help dry it once the drain is repaired.

Dunwoody permits and inspections

In Dunwoody, a stand-alone plumbing repair is generally covered by a single trade component permit, which can be issued over the counter, and the work should wait until it is. The city's permit FAQs explain that permits go to contractors who hold a license or to an owner who lives in the home. Replacing a standpipe or re-piping a laundry branch is the kind of job to clear with Community Development first.

Laundry drain questions in Dunwoody

Why does my washer standpipe overflow only during the spin cycle?

The final drain before and during spin is when the pump pushes out the most water at the fastest rate. If the trap or branch is partly blocked with lint, or the pipe is too small for the flow, water rises in the standpipe faster than it can drain away. Clearing or upsizing the line usually solves it.

Can the washer drain hose go all the way down into the standpipe?

It should not be pushed in too far or sealed into the pipe. A hose jammed deep into the standpipe can siphon water back out of the machine or block air from entering, which slows draining. The washer manufacturer's instructions give the recommended insertion depth and standpipe height for that model.

Does a laundry sink share the washer's drain?

Often it does, either through the same trap or a shared branch. That means lint from the washer and anything poured into the sink end up in the same pipe. If the sink fills when the washer drains, the shared line is restricted and should be cleared or repaired.

When the standpipe keeps overflowing

Mopping up after every load is no way to do laundry. Alpha Plumbing and Sewer can check the standpipe and branch behind a Dunwoody washer; the number is (404) 409-4448.