Garbage Disposal Repair & Replacement in Johns Creek, GA

When a kitchen sink or countertop is replaced, the garbage disposal is caught in the middle. It has to be disconnected before the old top comes out and reinstalled once the new sink is in, and that sequence raises questions about whether to keep the old unit, how it attaches to the new sink and whether the drain will still line up. Treating garbage disposal repair and replacement as part of a Johns Creek remodel, rather than an afterthought, avoids delays at the end of the project.

Keep it or replace it?

A remodel is the easiest time to change a disposal, because the unit is coming out anyway and the sink opening is new. If the old one is noisy, rusty, slow or has needed repairs, swapping it now takes far less effort than doing it a year later under a finished countertop. If it is fairly new and working well, it can usually go back in, though a new flange is often needed to suit the new sink. Either way, decide before the countertop is ordered, since unit size can affect the cabinet layout.

The new sink and the flange

Disposals attach through a flange set in the sink's drain opening. Most sinks share a standard opening size, but thickness varies a great deal. Heavy materials such as fireclay, cast iron or composite sometimes need a flange with a longer neck or a different mounting kit, while thin stainless steel may want extra support. Check the sink maker's notes on disposals before you choose.

Watch the drain height

A deeper bowl or an undermount installation can put the drain opening lower than before, which drops the disposal and its outlet with it. If the trap ends up below the drain opening in the wall, the pipe between them would run uphill and the sink would drain poorly. It is one of the most common surprises in kitchen remodels. Measuring the new sink depth and the disposal's outlet height against the wall drain before ordering lets you pick a sink and unit that work together, or plan to lower the drain while the cabinet is open, which falls under drain repair.

Moving the sink or changing the layout

Moving the sink to a new spot, switching from a single bowl to a double, or relocating the dishwasher changes more than the disposal connection. The drain, the vent and the supply lines may all need rerouting. That is a bigger plumbing job and belongs early in the schedule, before cabinets and countertops are set.

Getting the sequence right

1. Before the old countertop comes off, the water to the sink is shut off and the disposal, drain and supply lines are disconnected.
2. Once the new sink and countertop are installed, and any adhesive or sealant has cured as the countertop installer directs, the flange is set and the disposal is mounted.
3. The trap, dishwasher hose and supply lines are connected, along with the faucet if it is new.
4. Everything is tested under running water, with the sink filled and drained and the dishwasher run through a cycle.

A new faucet often goes in at the same time and is covered under faucet and valve repair; replacing old shutoff valves while the cabinet is empty is worth considering too. Unit choices are compared on Alpha's garbage disposal page.

What Johns Creek's permit checklist says

Johns Creek, in Fulton County, publishes a permit checklist under which a plumbing fixture repaired or replaced in the same spot needs no permit, but fixture work that alters the piping does. Under the city code, permits go to contractors who hold a state license, or to an owner who lives in the home. If your remodel moves the sink or reroutes the drain, ask the city's Community Development staff how those rules apply.

Questions about disposals in a Johns Creek kitchen remodel

Can my old disposal be reinstalled on a new sink?

Often, yes. A sound unit simply twists off its mount before demolition and goes back on afterward. What usually changes is the flange, since a thicker or heavier sink may need a longer-necked one from the same product family. Store the unit upright and dry while the work goes on, and keep the hex key and mounting hardware with it.

Does an undermount sink work with a garbage disposal?

Yes. Undermount sinks take disposals the same way top-mount sinks do, through a flange in the drain opening. Because the bowl sits below the countertop, the disposal and its outlet often end up lower than before, so the trap and drain height deserve a check. The sink maker's instructions note any special flange needs for thicker materials.

When should the plumber come during a kitchen remodel?

Usually twice: once to disconnect the disposal, drain and supply lines before the old countertop is removed, and again after the new sink and countertop are in to set the flange, mount the disposal and reconnect everything. If the sink is moving or the drain needs lowering, an earlier visit is needed so piping changes happen before the cabinets are set.

Planning ahead

Bring Alpha Plumbing and Sewer in early by calling (404) 409-4448, so the disposal and drain in your Johns Creek kitchen are ready when the new countertop arrives.