Adding the faucet to the sink is the first step in replacing the bathroom faucet and drain connections. Water leaks from sink to faucet connections stink as bad as wookie breath. A rubber centering ring is included with the Talis Select. This ring centers the faucet on the hole in the countertop while it's being attached. If you don't use this ring, be sure to wear gloves when working with hot pipes!
After installing the new faucet, turn off the water supply at the house meter or front-door valve if you have one. Then remove the old stopper from the sink outlet pipe. Most stoppers are removed by pulling them out of the outlet pipe. Be careful not to let any water leak out of the stopper hole during removal. After the stopper is out, you can see that both the washer bottle and the tee fitting are worn out or broken. The washer bottle goes inside the wall next to the sink. It collects water from the overflow tube of the faucet and releases it through holes in its bottom when the handle is turned. The tee fitting is part of the junction between the sink outlet pipe and the larger main drainpipe. It connects to the end of the tee that goes into the wall. You should be able to easily pull these items out of the wall after removing the old bathtub/shower flooring.
Here are some other things to think about while buying for a new faucet.
If your instructions ask for it, run a bead of plumber's putty or silicone caulk around the bottom of the faucet or the faucet holes on top of the sink. Place the faucet gasket over the tailpieces, between the sink and the faucet's base. Then tighten the base screws to compress the gasket and secure it in place.
Sealing around the faucet keeps water out and makes it easier to replace worn-out parts. But only use putty or silicone to seal around a faucet; no aerosol cans or other pressurized containers are recommended because they contain chemicals that can damage other materials. Also, don't use wire brushes to clean the area around a faucet because the force of the bristles will also damage the gasket.
Here's how to remove a faucet from the wall: First, turn off the supply line leading to the faucet. Then use a pipe wrench to loosen the washer or nut that holds the fixture to the pipe. Finally, lift up the handle to remove the faucet.
To fasten faucet handles and spouts on sink and tub faucets, a variety of set screws are used. Because most set screws are tiny, always close the bathtub or sink drain before removing the set screw to avoid dropping it down the drain. Under the bend of lever faucets, look for a screw or rubber stopper. This is the set screw that controls flow through the system.
The set screw in a brass faucet goes into the handle or spout. It can be removed by turning it counter-clockwise. A plastic or metal stop may come with it, to prevent it from being turned all the way out. These sets have one-way valves that control water flow without using any electricity. They usually work by having a ball roll back and forth inside a cylinder attached to the handle or spout. The only way to turn off the water is to remove the set screw completely or push the handle up toward the overflow hole.
A single-handle bathroom faucet has its own shutoff valve inside the body of the faucet. It can be opened from outside the fixture with a tool required to match the type of valve used. These valves are easier to use than set screws because they don't need to be tightened securely or left loose enough to slide in and out of water channels.