To know how to install a garbage disposal in a systematic way, follow the steps given below:
Remove Existing Assembly
Start off with removing all parts of the disposer kit from the box followed by organizing the contents. Take off the P-trap along with the drain basket assembly from the sink. Below the sink, you need to place a large pan in order to catch water, which might spill as you disconnect the drain. Also, keep a towel in proximity to clean up spills.
Preparation For Assembly
If you have bought a pre-assembled flange assembly, then you’ll just have to remove the ring and loosen a few fasteners to get started with the installation process.
You need to locate the flange gasket. Some kits are accompanied by a rubber gasket, but it is better to use a plumber’s putty to prolong the life of the seal. Roll the putty so that it can easily wrap around the gasket under the flange. Using your fingers, press the putty around the underside of the flange, but make sure the putty is applied evenly.
Clean the Sink
You need to clean the sink thoroughly, especially the area around the drain opening.
Connect Fastening System
Insert the flange on the sink (topside) followed by attaching the fastening system on the underside. Apply pressure on the flange from above using a heavy object. With this, the flange will stay at its place when you attach the fastening system below. Some of the plumber’s putty will ooze beyond the flange edge, but you can remove it with a dirt cloth after you see that the seal is formed completely.
Attach Mounting Plate
On the underside of the sink, attach a mounting plate followed by fastening the screws.
You will have to connect the tailpipe to the rubber seal, which you can find on the side of the disposer unit. Also, secure the pipe using a metal spring ring.
Remove Breakout Plate
If you want to drain the automatic dishwasher through the disposer, you’ll have to go through the inlet port in order to locate the breakout plate. Once you locate it, gently punch it using a screwdriver and hammer to remove it. If you don’t want to use the unit to drain a dishwasher, then you will have to leave the breakout plate as it is.
If your disposer unit doesn’t come with a power cord, then you will have to remove the plate using a screwdriver in order to access the electrical wiring. Buy a wiring kit, which is compatible with your disposer unit. Connect the wiring harness to the disposer, but make sure that the cord is long enough to get to the receptacle.
Attach Disposer Unit
Place a rubber seal ring on the top of disposer using a flange under the sink. Press the rubber seal ring into place and then, loosely secure it by rotating lower mounting ring onto the ramp tabs of upper mounting ring. Keep rotating the disposer unit until it aligns with drain assembly.
Connect Disposer to P-Trap
Trim the PVC extender pipe using a PVC cutter or a hacksaw followed by connecting disposer to a P-trap.
As the assembly of the drain is completed, you need to keep rotating lower mounting ring until you see the locking of all three mount tabs over ridges in the slide-up ramps. As it happens, tighten with the help of a screwdriver.
Ensure the security of Unit
Plug the drain with a stop and fill the sink with an inch of water to test the unit for water tightness. Check if there are any leaks under the sink, and if there aren’t any, then the plumber’s putty is intact. Get rid of the drain stopper and let the drain and P-trap fill with water. Plug the unit into a GFCI-protected receptacle and connect the cords as per your requirements.
With that, the process of how to install a garbage disposal concludes, and now, you can try the entire process on your own.