When installing a faucet, these are some of the most common measurements you’ll need:
Faucet Centers: If your faucet has a base with 2 inlets, measure the distance from the center of one inlet to the center of the other. This number must match the spacing of your building’s water lines (adjustable centers will help with the spacing). If mounting through the backsplash on a sink, the center measurement must also fit within the pre-drilled mounting holes.
Flex Hoses: If your faucet has flex hoses make sure that they will reach your building’s water lines.
Spout length: Make sure that the faucet spout will fit comfortably over your sink bowl and not extend too far / not far enough. If you plan to use a swing spout over a multi-bowl sink, make sure it will reach all of the bowls.