Batch-feed garbage disposal: field service manual

Covers: Residential batch-feed units activated by the sink stopper/cover

Cross-checkedBrands: InSinkErator, Waste King, Moen4 components

Batch-feed disposals run only when the special stopper/cover is placed in the sink opening, so the chamber is closed while grinding. There is no wall switch: the outlet under the sink stays live, and a switch inside the unit (mechanical or magnetic) is closed by the stopper. Mounting, plumbing and jam service are the same as continuous-feed.

Safety first

Unplug before any work; the outlet is always live
Never put hands in the chamber

How it works

Waste is loaded first; inserting and turning or pressing the cover closes an internal switch and starts the motor.

Removing the cover stops the unit.

Some designs use a mechanical (cherry-type) switch in the housing wall; others use magnets in the cover aligned with the unit.

Slots in the cover let water flow in while grinding.

Components & tests

Unlock all 4 components, specs, service mode and teardown

Full library + AI assistant for $34.90, one time.

Get lifetime access

Official manufacturer documentation

Always confirm values against the tech sheet for the exact model.

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Inside a worn garbage disposal: rusty grinding plate and lugs seen from the sink by Rthardin, CC BY-SA 3.0

Diagnostic guides for this appliance

Guide · Garbage Disposal

Garbage disposal hums but won't turn (jammed)

A humming disposal almost always has a jammed turntable: a hard object or packed waste is stopping the motor. Free the plate with the hex wrench from below (or a wrench on the impellers from above), clear the debris, then reset the overload. Never put a hand in the grinding chamber.

6 steps ~20 mineasy

Guide · Garbage Disposal

Garbage disposal dead: no hum, no power

Work from the simplest cause: the motor overload (red reset), then the breaker and outlet, then the switch type (wall switch, air switch, batch-feed stopper switch). Replace the disposal only after power is proven at the outlet and the reset does nothing.

5 steps ~30 mineasy

Guide · Garbage Disposal

Garbage disposal leaking: top, middle or bottom

Find the exact leak point with the paper-towel test. Top = sink flange seal or mounting; middle = dishwasher inlet or discharge elbow; bottom = water inside the housing. Flange and connection leaks are fixable; water from the motor housing itself usually means internal seal failure and replacement.

5 steps ~45 mineasy

Other garbage disposals manuals

Manual · Garbage Disposal

Continuous-feed garbage disposal: field service manual

Residential 1/3 to 1 HP continuous-feed disposals, corded or hardwired, wall-switch or air-switch controlled

6 components5 common failuresInSinkErator, Waste King, Moen, GE

Manual · Garbage Disposal

Garbage disposal installation & replacement: field manual

Residential continuous- and batch-feed disposals, three-bolt and twist-lock mounts

0 components0 common failuresInSinkErator, Moen, All