The quick answer by scenario
Time depends on what is already under your sink. A replacement that matches the old mount and the old wiring is quick. A first-time install adds drilling, wiring and plumbing steps.
Typical time for each situation
These are working estimates, not guarantees.
| Situation | Estimated time | What adds time |
|---|---|---|
| Same-brand swap, same mount | About one hour | A stuck mounting ring |
| Different brand, new mount | One to two hours | Matching the flange and drain angle |
| First-time install with a switch | Two to four hours | Wiring, outlet and drain changes |
| Dishwasher connection changes | Add 30 to 60 minutes | Knockout plug and hose clamps |
What happens during the swap
First the power goes off and the old unit is disconnected from the drain, the dishwasher hose and the electrical supply. The mounting ring comes off and the old disposal drops out.
Then the new mounting assembly goes in with fresh plumber's putty, the new unit locks onto the ring and the drain and dishwasher lines reconnect. Last comes a leak test with water running and a spin test to confirm the unit grinds.
Things that stretch the timeline
A corroded flange, a drain line that sits at the wrong height or a dishwasher knockout plug that was never removed all add time. So does a power cord that is too short or a switch that does not exist.
If the electrical supply is not at the sink, an electrician may need to run it, and a plumber will tell you that before starting. Clear the cabinet before we arrive and remove cleaning supplies so the workspace is open.
Barberton drains and what goes in the disposal
Barberton's stormwater pages describe a sewer system that includes combined, sanitary and storm sewers. In a system that handles that much flow, grease from kitchens is a long-term maintenance issue for the city and for your own lateral.
A disposal does not make fat disappear. It chops food so fat travels farther down the pipe before it cools and sticks. Scrape pans into the trash, and use a disposal for small food scraps with cold running water.
Source: City of Barberton stormwater information.
DIY or call a pro
Many homeowners can swap a disposal with a hex wrench and a screwdriver if the old mount matches. The risk is a poor seal that leaks into the cabinet, or a wiring mistake that trips a breaker.
If you do not want to risk a slow leak, a plumber handles it quickly and backs the work. Our garbage disposal repair and installation page lists what we cover, and a persistent slow drain may call for drain cleaning at the same visit.
Tools and preparation that save time
Gather a screwdriver, a hex wrench, slip-joint pliers, plumber's putty, a bucket and a flashlight. Clear the cabinet, lay down a towel and shut off power at the breaker before touching the old unit.
Take a photo of the wiring and the plumbing before you disconnect anything. It makes reassembly faster and helps if you need a plumber to finish.
Horsepower and feed type
A one-third horsepower unit handles light use, while a three-quarter or one horsepower unit handles heavier loads with less jamming. Continuous-feed models run while you add scraps, and batch-feed models run only when the lid is in place.
Pick the size for your household and habits. A larger motor does not clear a clogged drain line, but it reduces jams from tougher scraps.
Mistakes that cause leaks later
Too little plumber's putty under the sink flange, uneven tightening of the mounting screws and a reused rubber gasket cause most slow leaks. So does forgetting to tighten the drain slip nuts after the unit shifts.
Run water and check every joint with a dry paper towel. A damp towel means a leak, and it is easier to fix now than after the cabinet floor swells.
First-week checks
Look under the sink daily for the first week. Run the dishwasher once, because its drain hose connects to the disposal, and watch for drips at the hose clamp.
If the unit hums but does not spin, press the reset button on the bottom and try the hex socket. A new unit that jams often has a foreign object like a utensil in it.
Planning around the sink
Allow a window of time when the kitchen sink is not needed, and move dishes out of the way before the plumber arrives. If the dishwasher runs every night, plan the visit around that cycle.
Tell the plumber about any slow drains in advance, because it is easiest to clear the line while the unit is out.
Following the instructions
A disposal should be installed according to the manufacturer's instructions, and its drain must meet the Ohio Plumbing Code, built on the International Plumbing Code (IPC). Skipping the air gap or high loop for the dishwasher line is a common shortcut that causes backups.
Before you buy the unit
Check the horsepower, the mounting style and whether the new unit fits under your sink with the trap in place. Corner sinks and shallow cabinets sometimes need a compact model.
We install disposals in Barberton, Norton and Copley, and we can bring a unit if you would rather not shop.
Questions readers ask
Yes, if you are replacing a unit with the same mount and the wiring is already in place.
Only if there is no switch or outlet under the sink. Many sinks already have power.
A first-time install takes longer because we need drain changes, power and a switch. We tell you the time and price before starting.
The city's sewer system includes combined sewers, and grease causes trouble in any system. Keep fats out, run cold water and use small scraps.
A jam or a loose connection is a repair. A leak from the housing or a seized motor is a replacement.
Have a question about your own home? Call (855) 575-2890.