What is going on
A disposal install looks simple until the drain piping does not line up. The disposal outlet has to drain downhill into the trap, the dishwasher hose needs a proper connection, and the whole unit hangs from a sink flange that must seal. Install it too low and water sits in the line. Skip the knockout plug and the dishwasher backs up. People call us to replace a dead or leaking unit, to step up in horsepower, or to add a disposal to a kitchen that never had one.
What we check
- 01
Power source
Existing switch, outlet or hardwired circuit under the sink.
- 02
Drain height
Outlet height compared to the wall drain so water flows downhill.
- 03
Dishwasher connection
Knockout removed and the hose looped high or tied to an air gap.
- 04
Sink flange seal
New flange and gasket, seated flat with no rocking.
- 05
Run test
Full water flow, the unit running, and a towel check at every joint.
Your options
Same-size replacement
Old unit died. New one uses the same mount and drain layout.
Horsepower upgrade
Bigger motor for busier kitchens. May need small drain adjustments.
New install
No disposal before. Requires power under the sink and a properly placed drain.
Before we get there
Check under the sink for a switch-controlled outlet or a wire coming out of the wall. If neither is there, let us know when you call, since the unit needs power. Empty the cabinet and pull any trash can out of the way.