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How to Install a One Piece Counter & Sink in a Bathroom

A new countertop and sink fixtures in your bathroom can add new life to an old toilet. This job is simple enough, even if you aren’t a professional carpenter or plumber. Many home improvement stores offer you sink units tops and one-piece counter that fit over base cabinets that are existing or new. You simply have to pick the size countertop to fit the base over. You shouldn’t have to call a plumber since this entails connecting fixtures with existing plumbing.

Eliminate the Old Countertop and Sink

Open the doors of this cabinet and get rid of the drawers to give access to you . Switch off the water to the bathroom sink at the supply valves. Open the faucets to permit water to drain out of the pipes.

Use an adjustable wrench to loosen the nut. Since you divide it from the hold a container under the drain.

Slip a putty knife around the border of the old cabinet in the place where they match the wall to break any seal that’s holding them and sink. Twist the putty knife between the countertop and the cabinet. Some countertops may have screws or clips that you want to loosen to remove them from the base cabinet. Slide a pry bar between the wall and the cabinet to loosen the cabinet if the countertop has a seal. Be careful not to damage the wall.

Pull the countertop off the base cabinet. Place it aside.

Scrape off. Touch up any damaged paint on the wall and allow it time to dry before moving.

Install the One-Piece Bathroom Vanity Sink

Set a carpenter’s level on top of the base cabinet to check for levelness front to back and both side to side. Glue wood shims on top of the cabinet walls, if necessary, with carpenter’s glue.

Put plumber’s putty around the exterior border of the putty plate on the faucet. Put the putty plate over the holes on the top of the sink. Set the deck plate and center it. Twist the faucet into position. Attach to the sink. Do not over-tighten the nuts or the sink might split.

Wrap plumber’s tape around each of the water supply outlets on the tap. By tightening the nuts by hand turning one-quarter turn together with the wrench that is adjustable secure the supply lines.

Make a snake out of plumber’s putty. Wrap the putty around the top of the drain opening at the sink. Push the drain flange down and through the top of the hole to the putty. Attach the threaded flange to the bottom. Wipe off any excess putty.

Wrap plumber’s tape around the threads of the threaded flange. Twist the tailpiece and tighten it. Orient the popup lever so it points to the back of the sink fixture.

Follow the manufacturer’s directions for lifting mechanism and installing the drain stopper. The instructions of each fixture are different. Close and open the drain to guarantee everything is functioning correctly.

Run a bead of silicone caulking along the top of the walls of the base cabinet. With the help of a helper, turn the one-piece sink/countertop over and place it. The drain’s pipe should slide in the P-trap as you align the countertop. Line the countertop up and then press it firmly to the caulking.

Pull the nut for the P-trap into position and tighten it. Tighten it turn together with the adjustable wrench.

Run a bead of silicone caulking between the countertop and the wall to maintain moisture from getting from the cabinet. Continue the caulking down the wall along either side of the base cabinet. By conducting your finger along its top neaten the caulking.

Fasten the water supply lines on the supply valves. Turn the water to check for leaks. If necessary, tighten dripping pipes no more turn.

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