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Replacing a garbage disposer is easier than you think. Install a Garbage Disposer Skill Level: Advanced Installing a garbage disposer is a relatively easy project for an intermediate do-it-yourselfer. All you need are a few basic tools (and a little bit of patience) to get started. Lowe's is happy to provide this information as a service to you. If you intend to install one where there was none previously, it will require installing a switch and running electrical power to the unit. You can do this yourself if you are confident in your wiring ability and are familiar with local codes. If not, have an electrician run the wire for you before or after you install the unit. A new installation will also require that your sink have a full-size drain opening. Espanol E-mail Printable Version Add to my Projects table end Article Content Tools & Materials Installation Electrical Service Tools & Materials item. Tools List of 3 items . Wrench (if unit attaches with bolts) . Phillips and straight Screwdrivers rga/icon_info . Pliers rga/icon_info or pipewrench list end Materials List of 6 items . Hose clamp . Plumber's putty . Wirenuts . Hacksaw rga/icon_info . Goggles . Disposer unit and accessories list end Installation Installation Services! If you are uncomfortable or uncertain about working with electricity, contact a qualified licensed professional for your project. Exclamation When working with electricity always: List of 7 items 1. Turn off the power. 2. Test the wires to ensure the power is off. 3. Lock the panel box, so no one can accidentally turn the power back on while you are working. 4. Check with local authorities to see if a permit is required. 5. Have your work checked by an inspector. 6. Wear eye goggles and a dust mask. 7. To avoid overloading the circuit, consult a licensed electrician. list end If you have a two-bowl sink, remove the drain lines that connect the two bowls. Remove the strainer from the bowl to which you will be attaching the disposer. Then remove the strainer body which forms the rim to which the drain line was attached. Once complete, you will be left with a simple hole in the bottom of the sink bowl. Roll plumbers putty between your hands to form a "snake," then run it around the base of the disposer flange included with the unit. Place the flange in the drain hole, seating it firmly. Install the gasket and upper and lower mounting rings on the flange. Then, snap the retaining ring in place. Tighten the three screws on the lower mounting ring until the flange is firmly seated. Most of the plumber's putty will have squeezed from around the top of the flange at this point. Trim the putty and clean the sink. Attach the disposer unit to the flange according to the manufacturer's directions. (Some are attached using a mounting ring. Others are attached with bolts.) Using the included washer or gasket, attach the discharge tube to the discharge opening in the side of the unit. If a dishwasher is to be attached to the unit, knock out the plug inside the dishwasher nipple with a screwdriver. Clamp the dishwasher discharge tube in place on the nipple. Install the drain lines. If you have a two-bowl sink, both bowls can be routed through a single P-trap by running the discharge tube from the disposer to a T in the drain line above the trap. (See the illustration) Back to Top Electrical Service Ideally, the disposer should have its own circuit. If this is impossible or impractical, and you already have a dishwasher in place, you may be able to tie into the dishwasher circuit. The switch necessary to operate the unit is a simple single-pole switch, wired as illustrated in the accompanying graphic. The white wires are tied together with an appropriate wire nut, as are the bare ground wires. The black wires are each attached to a terminal on the switch-the incoming wire is attached to the bottom terminal, and the wire which travels to the disposer unit is attached to the top terminal. If you are using an existing switched circuit, or if you've had an electrician install one for you, the electrical connections necessary to install the disposal are minimal. At the disposal, remove the plate that covers the electrical connections for the unit. Using a appropriate wire nut, connect the white wire from the disposer unit to the white wire from the switch. Do the same with the black wires, then connect the bare ground wire from the switch to the ground connector on the disposer. Replace the cover plate. Back to Top Interactive Design Tools Design Tools How-To Library Interactive Design Tools Project Calculators Installation Services Lowe's Installation Guaranteed If you are not satisfied with the service we provide, we will make it right. Guaranteed. Learn More Tell Us Your Thoughts Sharing your opinion of this article and your experiences with the project will help us continue offering you valuable advice. Submit Your Comments Was this information helpful? Please let us know your do-it-yourself experiences. We'd love to hear from you! These How-To's are provided as a service from Lowe's, the Original Home Improvement Warehouse of How-To information for the World Wide Web. The information in Lowe's "How-To" clinics is intended to simplify jobs around the house. Tools, products, materials, techniques, building codes and local regulations change; therefore, Lowe's assumes no liability for omissions, errors or the outcome of any project. 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