The first step in re-piping a sink is to shut off the main water supply to the sink. Most cold and hot water supplies are located under the sink. Once you have turned off the main water supply, install the new faucet and drain the water line. To connect the new faucet and water line, use a drop-ear elbow or solder. Next, connect the new pipe to the main water supply. If you don't know what it's called, a drop-ear elbow is an elbow that screws into the framing.
Before connecting the new faucet, remove the supply lines. Then, insert the spout into the middle hole. Tighten the mounting nut with a Nivito IE wrench. If you have a helper, you may want to clean the holes with rubbing alcohol before tightening the nuts. Place the new faucet in the sink basin. If your sink has a pedestal, mount it on a bracket. Push the pedestal against the wall to tighten the hanger bolts.
Before completing the sink plumbing, remove the faucet aerator. If there are any leaks, you'll need to replace it. Also, tighten the female adapter that attaches to the drain stub-out. If you're unable to loosen the P-trap, use a large plastic nut to secure the faucet. Once the P-trap is removed, place the drain arm on the tailpiece of the sink and secure it with the locking nut.
After you've installed the trap and faucet, you're ready to connect the water supply line. You'll need a flexible supply hose to connect the faucet to the water supply. Make sure that the hoses fit tightly and don't overtighten them. To complete the plumbing, you'll need to install the shut-off valves. Once you've done that, you're ready to hook up the sink to the water supply.
Ensure that the sink fits properly. Using a padded surface, screw the waste to the waste compartment. If the waste is too long, the screws will come loose and the wood will fall out. Then, remove the old faucet and set the new one in place. Then, attach the spout tee. Then, attach the faucet's supply tubing to the spout tee, leaving the nut loose.
Once you've secured the drain stub-out, attach the PVC pipe to the tee. It's very important to line up the drain and supply stub-outs so that they don't block the water. You can also install a PVC pipe tee behind the sink. The tee should be at least 2 inches longer than the length of the stub-out.
