A growing number of homeowners, property managers, and landlords are removing their garbage disposals entirely — not because they've given up on kitchen cleanliness, but because they've done the math. Repair costs, emergency service calls, water bills, and eventual replacement make the long-term case for ditching the disposal surprisingly strong.
This guide covers what the conversion process involves, what it costs, how a dishwasher connection is handled, and what professional-grade drain protection to specify in the same installation.
Is It Legal to Remove a Garbage Disposal?
Yes, in every U.S. jurisdiction — and this is worth answering plainly, because many homeowners assume otherwise.
According to a detailed review by Garbage Waste Disposal, the International Plumbing Code (IPC) and the Uniform Plumbing Code (UPC) — the two model codes adopted across all U.S. states — do not explicitly require garbage disposals in residential kitchens.¹ Their focus is on ensuring that plumbing systems prevent blockages and contamination of the water supply or sewer infrastructure. What codes require is a safe and sanitary way to manage household waste, which can be achieved through many means besides an in-sink grinder. To date, there is no known state law or city ordinance in the United States that makes garbage disposals mandatory in residential homes.¹
That finding is consistent with the practical experience reported in professional plumbing and electrical forums, where experienced contractors routinely note they have never encountered a jurisdiction that requires a garbage disposal as part of a code inspection.²
The only nuance worth knowing: some older local housing maintenance codes require "adequate garbage disposal facilities or garbage storage containers" — phrasing satisfied by trash bins and composting receptacles, and that does not require an in-sink grinder.³ Your licensed plumber can confirm local requirements before the job begins.
Why People Are Making the Switch
Homeowners choose disposal removal for a range of reasons. Many are tired of recurring clogs, expensive repair calls, and the maintenance burden of a mechanical appliance that grinds food into the same drain lines it is supposed to protect. Others prefer composting food waste — a practice the disposal actually prevents, since it grinds and flushes food that could otherwise be returned to the soil.
The environmental case is significant. The U.S. Environmental Protection Agency advises homeowners to eliminate or limit the use of a garbage disposal, noting that this will significantly reduce the amount of fats, grease, and solids that enter your septic tank and could clog the drainfield.⁴ The EPA is explicit about the mechanism: food waste that enters a septic system through the disposal leads to scum and sludge accumulation in the tank, and if the tank is not pumped frequently enough, solids are pushed into the drainfield and can cause clogs and system failure.⁴ Removing the disposal eliminates this input entirely.
For homes connected to municipal sewer systems, the impact is equally real. Food waste ground by disposals enters wastewater treatment plants as biological oxygen demand (BOD) load, increasing the energy required to treat the water. Composting the same material — which a standard drain screen enables directly — keeps that load out of the system.
What Parts Are Needed
The materials required for a disposal-to-drain conversion are straightforward. As Lowe's explains, the primary components are a new sink strainer, drain tailpiece, and P-trap assembly, along with plumber's putty, slip-joint pliers, and a bucket to catch residual water.⁵
A common practical challenge is the elevation difference between where the old disposal outlet sat and where the new P-trap connection point needs to be. Disposals are bulky units that position their drain outlet lower than a standard P-trap assembly typically sits. As the Family Handyman notes, if the old discharge tube is too long or too short for the new configuration, you will need to adjust or replace it — discharge tubes are cut to length or extended as needed to align with the drain connection.⁶ A licensed plumber handles this measurement and fitting as a routine part of the conversion.
For double sinks, the new plumbing simply replaces the disposal's outlet position with a standard tailpiece connecting to the shared P-trap — a familiar configuration that plumbers complete routinely.
Step-by-Step: The Conversion Process
Step 1: Disconnect the Power
Before touching any plumbing connections, the disposal must be fully de-energized. Lowe's advises turning off the circuit breaker to the kitchen first.⁵ For hardwired units, use a non-contact voltage tester at the disposal's wire connections to confirm zero voltage before proceeding. For plug-in units, simply unplug from the outlet beneath the sink.
Step 2: Disconnect the Dishwasher Drain (If Present)
If a dishwasher connects to the disposal, its drain hose must be detached from the disposal's inlet port before the unit is removed. InSinkErator's installation documentation notes that the dishwasher drain hose attaches to the disposal's dedicated inlet via a hose clamp, which is loosened with a screwdriver.⁷ Cap or elevate the dishwasher hose temporarily to prevent water backflow during removal.
Step 3: Disconnect the Drain Lines
Set a bucket under the drain connections. Lowe's describes this step: set the bucket under the P-trap and disconnect the drainpipes.⁵ The discharge tube — the pipe extending from the side of the disposal to the drain connection — is typically a slip-joint connection that loosens by hand or with slip-joint pliers. The P-trap is similarly loosened and removed, with water collecting in the bucket as it is detached.
Step 4: Unmount and Remove the Disposal
F.F. Hitchcock explains the unmounting process clearly: locate the thin metal mounting ring on the disposal, grab the three metal lugs, and twist the mounting ring counterclockwise to release the unit from the sink mount.⁸ Most units drop free with a short turn once the ring is disengaged. The disposal is heavy — Lowe's advises having assistance for this step if possible.⁵ Once free, scrape away any plumber's putty or residue from the sink drain flange to prepare a clean, dry surface for the new drain hardware.
Step 5: Install the New Drain Screen
Apply a thin rope of plumber's putty — approximately a half-inch thick — around the underside rim of the new drain fitting. As DisposalQA describes in its step-by-step removal guide, insert the strainer into the drain hole from above and press it tightly into place, immediately wiping away any excess putty that squeezes out around the rim.⁹ From beneath the sink, install the rubber gasket, friction ring, and locknut onto the strainer's threaded shaft, tightening with channel-lock pliers. Do not overtighten, which can crack porcelain or ceramic sinks.
Step 6: Reconnect the Drain Plumbing
Connect the tailpiece from the new drain fitting down to the P-trap, and the P-trap outlet to the wall drain line. As InSinkErator's plumbing documentation notes, the drain pipe connection between the P-trap and the wall inlet must be properly aligned — if the discharge tube is too long, cut it to the necessary length; if too short, a tailpiece extension bridges the gap.⁷ Wenger Services confirms that the tailpiece is secured with a slip-joint nut and a plastic or rubber washer, and that the P-trap's U-bend holds a small volume of water that blocks sewer gases from rising into the kitchen.¹⁰
Step 7: Reconnect the Dishwasher
The dishwasher drain hose cannot connect to a standard basket strainer — there is no inlet port on the strainer body. Instead, it connects to a high-loop configuration: the hose is routed up to the underside of the countertop before dropping back down to a tee connection on the drain tailpiece or P-trap inlet. As Hunker explains, in states where an air gap isn't required, the drain hose must form a loop with the top of its curve above the flood level of the sink, ensuring water can never flow back into the dishwasher.¹¹ Your plumber will specify the correct method based on local code.
Step 8: Test for Leaks
Once all connections are complete, fill the sink basin with several gallons of water to create pressure, then release it quickly while observing all joints beneath the sink for drips or seepage. Run the faucet at full volume for several minutes and inspect again. As DisposalQA advises, run lots of water and use sealants wherever necessary.⁹ Run the dishwasher through a full cycle and confirm the drain hose connection remains dry.
Cost to Remove a Garbage Disposal and Install a Regular Drain
The material cost for a disposal-to-drain conversion is modest. As experienced contributors to the DoItYourself.com plumbing forum confirm, the hardware — a new basket strainer, P-trap, and necessary PVC fittings — typically runs around $50 in parts, with the labor running about one to two hours for a licensed plumber.¹² XO Appliance puts the professional cost for disposal-related plumbing work in the $200–$500 range nationally, depending on market and installation complexity.¹³
Over time, the calculation strongly favors removal. A disposal requiring one to two emergency service calls per year, plus replacement every 8–12 years, accumulates a 10-year cost of $800–$2,000 or more. A single drain conversion eliminates all future disposal-related maintenance costs at a fraction of that total.
The Better Upgrade: SemperScreen® Permanent Sink Screen
A standard basket strainer is removable — occupants pull it out, and food eventually finds its way back into the drain. For a single-family homeowner living alone, that discipline is manageable. For rental properties, multifamily units, or commercial kitchens serving multiple users, it is not realistic. In fact, one major retailer (with over 1900 stores and distribution centers) made the switch in their breakrooms and is saving "thousands of dollars" per install.
The SemperScreen® permanent sink screen installs in the same 3.5-inch drain opening as any disposal, using the same plumber's putty and mounting hardware as a standard basket strainer. The critical difference is that SemperScreen® permanent sink screens are non-removable by occupants — once installed, the screen protects the drain for every user, every time, without relying on anyone's discipline or awareness.
The screen filters food debris down to grain-of-rice size. Water flows freely through the mesh surface. Food accumulates on top, where it can be wiped or scooped into a compost bin or trash in seconds — no water required. This also enables the composting behavior the EPA recommends as an alternative to disposal use, keeping food waste out of both septic systems and municipal wastewater.⁴
ASME A112.18.2-2011 and CSA B125.2 certified. Lifetime residential warranty. Learn more at semperscreen.com.
References
- Garbage Waste Disposal. (2025). Are Garbage Disposals Required By Code In USA? garbagewastedisposal.com
- Mike Holt's Forum. Garbage Disposals Required? forums.mikeholt.com
- American Legal Publishing / City of Huntington, IN. § 154.21 Plumbing, Garbage Disposal, and Egress. codelibrary.amlegal.com
- U.S. Environmental Protection Agency. How to Care for Your Septic System. epa.gov/septic/how-care-your-septic-system
- Lowe's. (2026). How to Install a Garbage Disposal. lowes.com
- Family Handyman. (2025). A Step-by-Step Guide to Installing and Replacing a Garbage Disposal. familyhandyman.com
- InSinkErator Support. Installing a New Garbage Disposal. support.insinkerator.com
- F.F. Hitchcock. (2022). How to Replace Your Garbage Disposal. ffhitchcock.com
- DisposalQA. (2022). How to Remove Garbage Disposal and Replace with Drain Pipe. disposalqa.com
- Wenger Services. (2025). How to Repair a Sink P-Trap Connected to a Garbage Disposal. wengerservices.com
- Hunker. Kitchen Sink Plumbing Code: What You Need to Know. hunker.com
- DoItYourself.com Forums. (2021). What Kind of Replacement Pipes Do I Need After Removing Garbage Disposal? doityourself.com
- XO Appliance. (2025). How to Replace a Garbage Disposal Without Calling a Plumber. xoappliance.com