How to Replace a Drain Pipe & P-Trap on a Pedestal Sink

Removal

• 1

  Remove the mounting screws from the base of the pedestal using a socket wrench fitted with a properly sized socket.

• 2

  Slide the pedestal carefully forward, away from the wall. Move the pedestal just enough to provide extra working room.

• 3

  Loosen the nut that connects the pivot rod to the back of the drainpipe. The pivot rod joins the stopper to a lifting assembly at the rear of the sink. Slide the loosened rod from the drainpipe.

• 4

  Remove the stopper from inside the sink.

• 5

  Place a pail or bowl beneath the P-trap to catch spilling water.

• 6

  Loosen the slip nut at either end of the P-trap using groove-joint pliers. Detach the P-trap, and empty its contents into the pail or bowl.

• 7

  Loosen the hex-shaped locknut that connects the drainpipe to the sink using the groove-joint pliers.

• 8

  Force the drainpipe up through the bottom of the sink, breaking the flange seal on the surface of the sink.

• 9

  Hold the flange seal from above while turning the drainpipe counterclockwise to loosen. If necessary, hold the flange with a damp cloth to provide better grip.

• 10

  Detach the loosened drainpipe from the flange.

Installation

• 11

  Scrape any remaining putty from the bottom of the drain flange using a slotted screwdriver. Cover the bottom of the flange with a fresh roll of plumber's putty.

• 12

  Fit the replacement drainpipe through the bottom of the sink until the head emerges through the sink drain hole.

• 13

  Thread the flange onto the head of the drainpipe.

• 14

  Tighten the hex-shaped locknut that secures the drainpipe to the underside of the sink.

• 15

  Join the longer end of the P-trap to the bottom of the drainpipe and the shorter end to the P-trap arm protruding from the wall.

• 16

  Tighten the P-trap slip nuts by hand before giving a final tightening with the pliers.

• 17

  Reinstall the stopper into the drain hole. Insert the horizontal rod back into the side of the drainpipe and tighten the locknut.

• 18

  Slide the pedestal back in place. Thread the mounting screws back into the pedestal base before tightening the screws down.