Here is a guide for how to buy a kitchen faucet by making a series of decisions based on your existing kitchen configuration.
1. Start with the sink: There are many different kitchen faucet and sink designs available, but they are not always necessarily compatible. Start by taking a look at your kitchen sink to determine how many mounting holes are available. This applies for an existing sink or for a new one if you are also buying a kitchen sink. If your existing faucet has a mounting plate on it, check under the sink to see how many holes the mounting plate covers. Each faucet tells you how many mounting holes it needs for installation. Kitchen faucets are available in 1, 2, 3 & 4 hole versions. Some faucets give you multiple options in one to accommodate different sink configurations. If the faucet you buy will only use 2 holes and your sink has 3, you’ll have to figure out what to do about that 3rd opening.
The location of the sink mounting holes is another thing to keep in mind. Often the faucet is located close to the center of the sink, but this is not always the case. If the faucet will be mounted on one side of the sink the spout needs to be long enough to reach the basin for it to be of use. A tall spout with a pull down spray nozzle is another option for a sink with corner mounting holes.