If you’re a DIYer trying to plumb a single sink with the garbage disposal, you’ve come to the right place.
Installing a garbage system on a single bowl sink is pretty easy since you don’t need to go through fitting in a second sink. You just need a few basic tools, and you’ll get it done in approx. 2 hours.
This easy-to-follow, step-by-step guide will show you how to do it on your own without calling in a professional.
Steps for installing a single sink plumbing with garbage disposal:
NOTE that the exact steps will depend on the specific type of disposal system you plan to install. The following is a generalized guide for handling any garbage disposal system.
Step 1. Turn off the circuit breaker connected to the garbage disposal switch. Confirm that the power is off using a non-contact electrical tester on garbage disposal wires.
Step 2. Use a large pair of sliding joint clamps to loosen the couplings holding the P-tarp bottom and drain extension pipe under your sink. Set the drain sections aside. You may want to slide a towel into the exposed drain pipe to help keep off drain odors.
Step 3. Now use the sliding joint clamp to help you loosen the nut at the base of drain coupling. This will help you loosen the coupling. While pushing the clutch up, lift the drain flange from your sink bottom part.
Step 4. Scrap off all the old plumber putty from the drainage hole. A plastic putty knife is an ideal tool for this job.
Step 5. Apply a bead of putty to the rinse flange of your garbage system and then process to evenly set the flange in the sink’s rinse hole.
According to Plex Plumbers, epoxy putty usually comes in two parts that you need to mix correctly to activate its adhesive and toughening agents for maximum performance.
Step 6. Place a gasket with the retaining ring onto the flange sleeve you just installed in the previous step, and then over the assembly and snap rings.
Tighten all the screws to firmly attach the assembly to the bottom of your sink. Be sure to get rid of any excess putty squeezed out due to the tightening process.
Step 7. Do you have a dishwasher in place? If yes, you’ll need to push out its knockout plug at this point. This is usually situated at the disposal unit’s side. A hammer and screwdriver will make this job easy for you. If you don’t have a dishwasher, you can let the plug stay.
Step 8. Now is time for wiring. Unscrew the wiring compartment cover and set it aside to expose the disposal system’s wiring component.
Insert an electrical cable (about 6-inch) from wall switch to a wire clamp in the compartment. Tighten the clamp to secure this cable.
Use a utility knife to remove the sheathing of the 6-inch cable above. Next, use wire strippers to strip off about ½-inch insulation from the two black and white wires.
Connect the cable’s black wire to the black wire in the disposal compartment and secure it with a wire nut. Do the same for the white wire.
Grab the end of the bare wire and wrap it around the grounding screw (usually green). Tighten this screw to secure the wire.
Finally, tuck all the wires into the wiring compartment and put the cover back on.
Step 9. Connect the discharge tube of the disposal to its outlet and tighten the coupler using your hands.
Remove the rag you towel you slid into the drainpipe in Step 2 to allow you to install the P-tarp and extension pipe back to drain pipe and discharge tube.
Use slip-joint pliers to tighten all the couplers available.
Step 10. If you have a dishwasher, connect its drain line to its knockout. Remember to tighten the coupler for a secure line to disposal connection.
That’s it! You’re done installing a single sink plumbing with garbage disposal. You can now go ahead and turn on the circuit breaker. Turn on the sink faucet, and test if your newly installed disposal system is working correctly.
Installing a single sink with disposal system on your own is pretty easy and will save you time and money. If you’re handling disposal installation for the first, follow the key steps we’ve just outlined above to correctly set it up. After going through this guide, we’re hopeful that you can now confidently handle an installation of your own, both the plumbing and electrical parts.