Garbage Disposal Repair & Installation in Alpharetta, GA
Disposal jams, leaks, hums-but-won't-run, full replacements. InSinkErator, Badger, Waste King. Most repairs same-visit; full installation including dishwasher tie-in completes in about an hour.
Garbage disposals fail in three patterns. Jammed (motor hums but the grind chamber doesn't turn). Leaking (from the sink flange, from the dishwasher inlet, or from the bottom of the unit). Won't run at all (electrical failure or fully-failed motor). Each has a known diagnostic path and the right repair vs. replace decision.
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Common disposal failures and their fixes
Disposal hums but doesn't grind. The motor is energized but the impeller is jammed — usually by a bone, fruit pit, silverware, or a hardened mass of fibrous waste. Most jams clear with the hex wrench at the bottom of the disposal (turn back and forth to free the impeller). Then press the reset button on the bottom. If that doesn't work, the unit may have damaged windings from running stalled.
Disposal won't run at all. Three diagnostic steps: (1) reset button on the bottom of the unit, (2) breaker check, (3) test continuity at the unit's switch. If the unit has power but won't run, the internal switch or the motor has failed — usually a replacement situation rather than a repair.
Disposal leaks from the top (flange to sink). The plumber's putty seal between the sink flange and the sink basin has dried out and lost its seal. Remove the unit, replace the putty seal, reinstall. About 45 minutes.
Disposal leaks from the side (drain or dishwasher connection). Tighten the connection first. If it still leaks, replace the gasket or the entire drain elbow. 20–30 minutes.
Disposal leaks from the bottom. The unit's internal seal has failed and water is entering the motor housing. This is a replacement scenario — internal seals on disposals aren't user-serviceable.
Replace or repair?
For most disposal failures, repair is the better economics when the unit is less than 5 years old. Past 8 years, replacement usually wins. The repair-vs-replace breakpoint shifts based on the specific failure:
Jams are almost always worth clearing regardless of unit age — it's a 5-minute fix when the wrench works. Top flange leaks are worth repairing even on older units because the fix is just a putty reseal. Bottom-housing leaks always mean replacement. Motor failures usually mean replacement — the motor cost plus labor approaches a new unit.
When replacing, we install InSinkErator (the most common brand we service), Waste King, or Badger units depending on what fits your sink and your usage. A 1/2 HP unit is adequate for light cooking households; 3/4 HP for typical family use; 1 HP for heavy daily use including bones and fibrous waste.
Installation scope — dishwasher tie-in and air gap
A standard install includes: removing the old unit (if applicable), installing the mounting assembly to the sink flange with fresh plumber's putty seal, hanging the new unit, connecting the drain plumbing including the trap, connecting the dishwasher discharge hose (if your kitchen has a dishwasher), connecting the electrical at the unit's switch box, testing in both directions.
The dishwasher connection is a small detail that matters: the discharge hose from the dishwasher goes to a port on the side of the disposal. Before connecting, we always knock out the plug that ships in that port — installing without removing the plug means the dishwasher's discharge has nowhere to go and backs up at the end of its cycle. This is the #1 mistake on DIY disposal installs.
Air gap or high loop. The dishwasher discharge needs an air gap (small chrome fitting on the sink top) or a high loop (discharge hose looped up under the counter before going to the disposal). Either prevents wastewater from siphoning back into the dishwasher. Alpharetta and most of Georgia accept either approach.
Garbage disposal habits and Alpharetta drain lines
What we recommend: scraps that grind cleanly (vegetable trimmings, soft food waste). Use cold water during grinding and for a few seconds after. Run the disposal for a few seconds after the water stops flowing through it.
What to avoid: bones (especially chicken bones — they wedge between the impeller and the chamber wall), fibrous waste like celery or corn husks (wraps around the impeller), grease and oil (solidifies downstream and causes drain line clogs), coffee grounds and rice (form a paste that clogs the drain line beyond the disposal), eggshells (the membrane wraps the impeller).
In older Alpharetta neighborhoods with original cast iron drain lines (Crabapple, Old Alpharetta), running a disposal aggressively shortens drain line life because the grindings accelerate scale buildup. Quarterly jetting on the kitchen line can offset this for homes that depend heavily on the disposal.
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Frequently asked
My disposal hums but won't grind. What's wrong?
Impeller is jammed. Most jams clear with the hex wrench in the bottom of the unit — insert and turn back and forth to free the impeller. Then press the reset button. If that doesn't work, check whether something is wedged between the impeller and the chamber wall. Persistent jam after manual clearing usually means motor damage.
How long should a garbage disposal last?
5–10 years for typical residential use; less if heavily used or grinding things that shouldn't be ground (bones, fibrous waste, grease). InSinkErator Evolution series and similar premium models tend to land at the top of that range; Badger entry-level models at the bottom.
Is it worth repairing or should I just replace?
Depends on the failure mode. Jams clear cheaply. Top flange leaks are worth fixing. Internal seal failures and motor failures usually push past the replace-vs-repair breakpoint, especially on units over 5 years old.
My dishwasher backs up. Could it be the disposal?
Yes — almost always one of two issues. (1) The dishwasher discharge plug in the disposal port was never knocked out at install (very common on new installs). (2) The dishwasher discharge hose is clogged. We diagnose by checking the disposal port first, then tracing the hose.
Can I install a disposal myself?
Most homeowners with basic tools can. The two things to get right: properly seal the sink flange with fresh putty (rushing this guarantees a leak in months), and knock out the dishwasher discharge plug if you're tying in a dishwasher. The electrical connection is straightforward if you turn off the breaker.