How to Clean a Kitchen Sink P-trap

Pipes beneath your sink act as the silent workhorses of your kitchen, but they eventually accumulate grease, food scraps, and soap scum that slow drainage and cause odors. The P-trap is specifically designed with a dip that holds water to prevent sewer gases from entering your home; unfortunately, that same design makes it a magnet for kitchen debris. Cleaning this trap yourself is a rite of passage for any homeowner. You do not need harsh chemicals or a professional plumber to clear a sluggish drain. When done well, the sink will drain with a crisp, audible swirl, and any lingering musty smells will vanish entirely from under the cabinet.

Clear Your Workspace First. Remove all cleaning supplies and items stored under the sink to create a clear workspace. Place a small bucket or a shallow plastic container directly beneath the P-trap to catch the water that will inevitably spill when you loosen the pipe.
Gently Loosen the Nuts. Identify the two large plastic nuts securing the P-trap to the drain tailpiece and the wall pipe. Turn them counter-clockwise by hand, or use channel-lock pliers very gently if they are stuck, ensuring you do not crack the plastic fittings.
Extract the Trap Carefully. Once the nuts are loose, slide them away from the trap and pull the P-trap off the pipes. Carefully tilt it into your bucket to drain the trapped water before moving it to a sink or utility tub for cleaning.
Scrub Out the Gunk. Use a bottle brush or an old toothbrush to scrub the inner walls of the P-trap. Rinse thoroughly with hot water to remove stubborn grease or slime buildup.
Check the Rubber Seals. Examine the rubber washers at each end of the trap for cracks or brittleness. If they look worn or damaged, replace them immediately to ensure a watertight seal upon reassembly.
Reconnect and Test. Slide the nuts and washers onto the pipes, then position the trap back into place. Tighten the slip nuts by hand until firm; do not overtighten, as this can strip the threads or crack the plastic.