Step 6 · Assemble and Connect New Drain Pipes
Begin by attaching a flanged tailpiece to the bottom of the newly installed basket strainer, securing it with a slip nut and washer. Now, loosely assemble the rest of the pipes to 'dry fit' them. Connect the second tailpiece from the other sink bowl. Attach the continuous waste tee (or sanitary tee) to connect both tailpieces. The outlet of the tee should point toward the drain pipe in the wall. This tee fitting must have a baffled side inlet for the dishwasher hose. Attach the dishwasher drain hose to this baffled inlet and secure it with its hose clamp. Create a 'high loop' by fastening the dishwasher hose as high as possible inside the sink cabinet before it connects to the tee. Finally, connect the P-trap between the bottom of the waste tee and the drainpipe in the wall. You may need to use a hacksaw or tubing cutter to trim a tailpiece or the horizontal arm of the trap for a perfect fit. Once you confirm everything aligns correctly and slopes gently downhill towards the wall drain, hand-tighten all slip nuts, then give each a final quarter-turn with channel-lock pliers. Do not overtighten.