P trap installation in your kitchen sink prevents sewer gas from leaking up the drain, and helps prevent clogs from progressing too far down the line. These P-trap installation instructions for a kitchen sink assume you have the sink ready and in position, and that you also have the drain lines in.
Step 1: Tail Piece
To begin the P-trap installation, remove the tailpiece nut. Place the washer on top of the tailpiece, and feed the nut up the pipe. Apply Teflon tape on the sink connection, and screw the tailpiece nut onto the sink. Tighten using your hands, or the pliers if necessary. Feed the slip-joint nut up the tailpiece, and put in the washer at the bottom.
Step 2: Dishwasher Drain (optional)
Some kitchen sinks come with an optional dishwasher drain. This is used to remove water from the dishwasher. If your sink has a dishwasher drain, attach it to the tailpiece, using the above method before proceeding to the next step.
Step 3: Attach the P-Trap
Moving along in your P-trap installation, attach the P-trap to the tailpiece or dishwasher drain, fitting the already installed washer and nut. Apply Teflon tape on the connection, and tighten the nut and washer all the way, using your hand or pliers. If you end up with a piece that is not properly aligned to your supply line, simply unfasten the P-trap installation and realign it.
Step 4: Connect the P-Trap to the Drain
Once you have the P-trap aligned, you need to connect it to the drain line. To do this, feed the nut down the pipe, place the gasket at the seam, and tighten up the nut using your hands.