Under the kitchen sink
Garbage Disposal Repair and Installation in Apache Junction, AZ
Jammed units, motors that hum without turning, and leaks that quietly ruin a cabinet base. Small job, quick fix, and honest advice if the unit is finished.
Scheduled during the day. Anything actively leaking into a cabinet is worth calling about immediately.
Disposals fail in a small number of predictable ways, and two of them you can often fix yourself in a few minutes. The rest are worth a visit, mostly because the leaks are the expensive part rather than the motor.
The local wrinkle is what happens downstream. A disposal grinds food into small pieces, but it does not make them disappear. In a kitchen branch line that already carries a coating of cooled fat, and on a property served by a septic system, the extra solids matter.
So the useful version of this page covers the repair, the replacement, and the part most people never get told: what a disposal does to the pipe and the tank behind it.
Disposal humming but not turning?
The four failures and what each one means
| Symptom | Cause | Fix |
|---|---|---|
| Hums but does not turn. | Jammed impeller. | Power off, free the jam, reset. Often a homeowner fix. |
| Completely dead. | Tripped reset, failed switch or failed motor. | Reset first, then test the switch, then replace. |
| Leaking at the top of the unit. | Failed sink flange seal. | Reseal the flange, which means dropping the unit. |
| Leaking from the bottom. | Internal seal failure. | Replace. This one is not repairable. |
| Very loud rattling. | Foreign object, usually cutlery or a bottle cap. | Power off and remove it before running again. |
| Slow drainage with the unit running. | The branch line, not the disposal. | Drain cleaning, not a new disposal. |
That last row is the most common misdiagnosis. A disposal that runs correctly but leaves a full sink is telling you about the pipe downstream, which is drain cleaning work.
Before you call, two things worth trying
Safe homeowner checks
- Kill the power.Switch it off at the wall and, if the unit is on its own circuit, at the breaker. Never put a hand in a disposal that has power available to it.
- Free the jam.Most units have a hex fitting on the underside for turning the motor manually. A quarter turn each way usually releases whatever is stuck.
- Find the object.Use tongs or pliers, never fingers, and look for the cutlery, bone fragment or bottle cap that caused it.
- Press the reset.The small button on the bottom of the unit trips on overload and needs pressing back in after a jam.
- Test with cold water.Run cold water first, then switch on. If it hums again, stop and call rather than repeatedly tripping the motor.
If it runs after that, you saved a service call. If it hums, trips again or leaks, the motor bearing or the seals have usually gone and a replacement is the sensible answer.
Cabinet base getting wet under the sink? Call (480) 806-2944.
Disposals on a septic system
Plenty of properties around the city and out toward Gold Canyon are on private septic systems, and a disposal changes the load on the tank. Every solid it grinds still arrives in the tank and has to be digested or pumped out.
If your property is on septic
- Expect to pump the tank more often than a comparable home without a disposal.
- Keep grease and oil out entirely. Grinding does nothing to fat and it goes straight to the tank.
- Avoid fibrous waste such as celery, corn husks and onion skins, which bind together in the line.
- Never use the disposal as a way to dispose of large food volumes after a gathering. Bin it instead.
- Consider whether the household actually needs one at all, since many septic properties run better without.
The pumping cadence and the state inspection rules that apply to private systems here are covered on the septic tank service page.
Choosing a replacement that fits the sink you have
Replacement is usually a straightforward job, and the choices that matter are motor size, grind stages, sound insulation and physical dimensions under the cabinet.
Larger motors handle harder waste without jamming and cost more. Sound insulated models are noticeably quieter, which matters in an open plan kitchen. Height matters more than people expect in shallow cabinets and in manufactured homes where the drain height is fixed.
Two installation details are worth insisting on: a properly seated sink flange with fresh plumber's putty or the manufacturer's gasket, and a dishwasher inlet knockout removed only if a dishwasher is actually connected. A forgotten knockout is the most common reason a new install backs up into the dishwasher.
Disposal questions from local kitchens
Hot or cold water when running the disposal?
Cold, always. Cold water keeps fats solid so they leave with the flow, while hot water melts them and lets them coat the pipe further down the line.
Run the water before, during and for a good few seconds after the unit finishes.
Are ice cubes or citrus peels good for cleaning it?
Ice helps knock deposits off the grind ring and is harmless. Citrus peel improves the smell and does nothing mechanical.
Neither cleans the drain line itself, which is where a persistent smell usually comes from.
How long should a disposal last?
Many units run for a decade or more with normal use. Hard water is less of a factor here than in the rest of the plumbing system, so the usual failure is bearings and seals rather than scale.
Can I put coffee grounds down it?
Better not to. Grounds compact into a dense sludge that combines with grease in the horizontal run, and they are one of the more common contributors to a kitchen line that needs clearing.
Do I need a permit to replace one?
Not for a simple like for like replacement on an existing connection. Permits come into play with new plumbing or electrical work, and the city publishes its exemption list for minor work.
Local code, licensing and how this page is maintained
Garbage Disposal Repair and Installation in Apache Junction falls under the 2018 International Plumbing Code. The City Council adopted that code as the Apache Junction Plumbing Code in 2019, along with local amendments to the fixture flow rate table. The city also enforces the 2018 IRC, IBC and IFGC and the 2017 NEC. Addresses outside the city limit, including Gold Canyon, are permitted and inspected through Pinal County instead.
Arizona plumbing contractors are licensed by the Registrar of Contractors. Plumbing falls under the C-37, R-37 and CR-37 classifications, and septic work under CR-41. Verify any contractor at roc.az.gov before work begins. The standards and guidelines summarised here are general, and the building department for your address is the authority on what applies to your job.
Written and reviewed by the Plumbing Guys Apache Junction team. Last updated 2026-09-06.
Get the sink working again this week
Call and describe the noise, the leak or the silence. Most disposal calls are a single short visit, and we will tell you on the phone if it is something you can fix yourself in five minutes.