Step 9 · Connect the Drain Plumbing

Now assemble the drain plumbing. Attach the tailpieces to the bottom of the sink strainer and the garbage disposal discharge. Connect the two tailpieces using a tee fitting. From the tee, install the P-trap, which connects to the drain line in the wall. Use slip nuts and washers at all connections. Hand-tighten all connections first, then give them a final quarter-turn with channel-lock pliers. Do not overtighten, as this can crack the plastic fittings.

Tools and Materials

Channellock 12 in. V-Jaw Tongue and Groove Pliers 442Oatey 1-1/2 in. x 12 in. White Plastic Flanged Strainer Sink Drain Tailpiece HDC9803QUICKFITTING 1/2 in. Push-to-Connect Brass Tee Fitting LF814ROatey 1-1/4 in. PVC P-Trap with Insta-Plumb Technology HDC9681Bucket