Following these expert, step-by-step instructions on how to install a garbage disposal shouldn’t be a problem as long as you have the right tools and materials.
Plumbers are expensive and installing a garbage disposal can seem daunting especially if you don’t have any experience. But learning how to do it yourself can save you a ton of money. If you follow the instructions below, you won’t have any problems installing your garbage disposal unit even if you have little or no experience.
Before you begin any work regarding installation, you will need a dedicated 20 Amp, 120 Volts outlet located under your sink in close proximity to the disposal. If this is not available already, you can simply ask your electrician to help you install one. Please note that batch-feed garbage disposals do not require a switch because they start when you insert and turn a special drain plug.
Choosing the Right Disposal
You need to figure out the type of disposal unit you will be needing by asking yourself questions like: who’ll be using it, will a noisy disposal be a serious issue in the house, what type of plumbing do you have in your home?
If you go for a replacement that is made by the same manufacturer as your old model, the job will be much simpler because you won’t need to replace the waste assembly mounting flange in the sink. It does not matter if it is a larger and more powerful unit, it only needs to have the same mounting flange. The more powerful and quieter the garbage disposal you buy, the more the price and the larger it will be.
Step 1: Prepare for the Project and Gather the Relevant Tools
Apart from choosing the right garbage disposal, ensure you have all the parts listed on the instruction sheet that comes with your purchase. You will need equipment like: a screwdriver, water pump pliers, a hacksaw, electrical cord, a disposer wrench, plumber’s putty, safety supplies – including a dust mask and goggles.
Once you have them ready, turn off the power to the disposal at the circuit-breaker box. Check the amperage of the circuit to ensure the disposal won’t overload it. This should be shown on the breaker switch.
Step 2: Remove the Old Disposal
Loose and detach the hose that attaches your dishwasher to the disposal by making use of a screwdriver. Detach the “P” trap waste line with a wrench then remove the disposal by using a screwdriver to turn the mounting ring counter clockwise until it comes loose. Prepare the sink for your new disposal unit by cleaning the flange, sleeve and sink opening.
Step 3: Prepare Your New Hardware
Place a rubber seal beneath the drain flange. If your new disposal does not include a rubber seal, you will need to use plumber’s putty. Put the drain flange in the drain hole then place another rubber seal on the drain flange under the sink and attach the metal backup ring, flat side up.
Step 4: Attach the Mounting Ring
Attach the mounting ring with screws then push it up and secure the mounting ring with the snap ring. Tighten the mounting screws – make sure the assembly is tight and even.
Step 5: Prepare Your New Disposal
Lift up your new disposal under the mounting ring then align it under the entry points in the mounting tracks. To engage the tabs, turn the ring so they lock onto the ridges. Tighten the connection by using a screwdriver. Align the discharge tailpiece with the drain trap by rotating the disposal unit. In order to accommodate your new disposal, you might need to replace some, if not all of the drain piping under the sink.
Step 6: Complete the Installation
Use a retaining spring or band clamp to connect the dishwasher drain hose to the disposer’s dishwasher connection nipple. Plug the power cord into the GFCI-protected electrical outlet that is connected to the switch.
Step 7: Test the New Garbage Disposer
Run water through the disposal for a few minutes to check for leaks. If there are no leaks, return to the electric panel then turn the power on. Finally, put everything back under the sink. That’s it. Now you know how to install a garbage disposal. Enjoy your new appliance!