The sink pop up drain system is the most common drainage assembly that is found in mostly all bathroom sinks. However, after some years, this assembly can get damaged and so, it should be replaced. Follow the steps below to install a sink pop-up drain in your bathroom yourself without spending money for a plumber’s service.
Step 1 – How Does It Operate?
Before starting the replacement process, it is important to know how a sink pop up drain system works. Basically, a pop drain has a ballcock assembly; when it goes up and down, the stopper at the center of the sink bowl will close and open. By this mechanism, when you pull the lever from the faucet, the stopper will close.
Step 2 – Shut Off the Water
Many older sinks and most newer ones have a shut off valve on the back, so you should turn this valve clockwise to close. Otherwise, if your sink does not have a shut off valve under the bowl, you have to turn off the water from the main valve. Also pull the stopper lever from the sink’s faucet to close the stopper since it needs to be closed to continue with the replacement.
Step 3 – The Clevis and the Pivot Rods
Now you have to operate from underneath the sink behind the pedestal, where you should locate the clevis and the pivot rods. These two rods are joined together forming an L-shape with the clevis rod standing vertically and the pivot rod horizontally.
Step 4 – Remove the Stopper
The clevis rod is attached from the top with the stopper lever while the pivot rod is connected to the drain. So, to remove them you must unscrew the two thumbscrews using your hand or a pair of pliers by turning them counterclockwise. In this way, you will detach the two rods by disconnecting the pivot rod from the sink drain pipe and the clevis rod from the stopper lever. Now that both rods are detached, you can easily pull out the stopper.
Step 5 – Remove the J-bend Trap
Behind the sink’s pedestal you can also see a j-bend trap which is attached from the bottom to the drain pipe and from the top with the sink via the drain basket. Use a wrench to unscrew the nut that secures the trap with the drain basket and be prepared from some water to come out. Use also a pair of channel lock pliers to unscrew the remaining nut to detach the trap from the drain pipe. Slowly pull the trap out and set it out of your way.
Step 6 – Remove the Drain Flange
Now that the rods and the trap have been removed, you can also remove the drain flange by cutting the putty underneath it using a plastic scraper. Then grab the flange and pull it out from the drain hole.