In a nutshell, installing the new faucet simply involves doing the steps in the above paragraph in reverse. If your new faucet has a hose attachment, you need to attach that first through the opening that was left by your old faucet. The hose needs to come down through the sink and then link up with the water supply in order to be properly installed. Once the hose has been installed (or the step skipped if you don't have a hose attachment), all you have to do is install the new faucet. This is done by following the steps outlined in the previous paragraph in reverse and attaching the nuts that connect the faucet to the sink and to the water supply. It is imperative that you double and even triple-check all of the connections to make sure they are not only secure, but leading to the right things. You don't want a member of your family turning on the cold water faucet and getting burnt as a result, so make sure that the cold water supply actually does lead to the cold water control.

Bathroom faucets are a different beast in and of themselves, although replacing the ones in the sink is a relatively simple and straightforward process that should be possible with the above method. However, you also may need to take into account the fact that there is a drain plug that can pop up and down; an element that is unique to bathroom sinks. If you follow the apparatus however, there should be one or two good targets of opportunity where the connections can be severed temporarily and reconnected later when the new faucet is installed. Just be vigilant in your observations and you should find this place with little difficulty.

As for bathtub faucets, these are much harder to deal with in a do-it-yourself type of way. The reason for this is that the plumbing in question that you would need to replace in order to effectively install the new faucet is usually behind a wall. In some of the houses there is an access panel in the wall that allows you to lift it up and get at the piping, but in other houses you might need to cut into the wall in order to replace the bathtub faucet. If you do cut into the wall, you might want to take this opportunity to create an access panel so that you do not have to cut into the wall again when you decide to replace the faucet in the future. It's not necessary, but definitely recommended if you foresee faucet replacement coming up again at some point.