Can a handyman replace a garbage disposal?
Yes. Replacing a garbage disposal on existing plumbing and power is a routine handyman job. The old unit comes off, the new one mounts to the sink flange, and the drain, the dishwasher line and the power are reconnected and tested.
A disposal hangs under the sink on a mounting ring, with a drain pipe off the side and often a dishwasher hose on a small inlet. The swap starts with the power off. The old unit is twisted free from the mount, disconnected from the drain and lowered out. The new unit gets the mount hardware that came with it, and sometimes the old mount can be reused if it matches. It goes up, the drain connects, and the dishwasher hose is clamped on. Then comes a leak test with water running. A like-for-like swap is quick, and a change of horsepower or style is worth mentioning on the call.