Project Source Downstream Drain Blockage

Garbage disposal runs but water and ground food come up into the sink instead of draining away

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Severe clog in P-trap or wall drain, Grease plug in horizontal drain, Collapsed or obstructed drain line, Improperly installed trap configuration

Safety first: Turn off power and avoid running the disposal until the drain is cleared.

Disassemble trap: Place a bucket under the trap, loosen slip nuts, and remove the P-trap and any nearby fittings. Clear all debris.
Snake wall drain: If the trap is clear, use a drain snake into the wall stub-out to remove deeper clogs.
Rebuild correctly: Reassemble the trap with proper slope and no sags that can collect debris.
Flush system: Run hot water for several minutes, then briefly operate the Project Source disposal to confirm proper flow.

Medium 3/5

Sink Drain Trap & Wall Drain

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