Step 4 · Assemble the P-Trap Components
The P-trap kit contains several parts: a J-bend (the U-shaped piece), a trap arm (the L-shaped piece), and two or three sets of slip nuts and beveled washers. Begin by connecting the sink drain to the P-trap. Slide a slip nut onto the vertical drain tailpiece, with the threads facing down. Follow it with a beveled washer, ensuring the beveled side faces down towards the J-bend. Align the J-bend with the tailpiece and hand-tighten the slip nut to connect them. Next, prepare the trap arm. Slide a slip nut (threads facing the J-bend) and a beveled washer (bevel facing the J-bend) onto the straight end of the trap arm. Insert this end into the outlet of the J-bend. Leave all connections hand-tight for now to allow for adjustments.