Installing a new Delta kitchen faucet is not too difficult when you have the right tools and instructions to follow. Every faucet has slightly different installation instructions based on the unique features of the model, but most faucets are installed in essentially the same way. This example is a Delta Leland pull-down kitchen faucet.
When picking out a faucet, you can decide how many holes you want to fill and how you want it to look. The installation instructions will change slightly depending on how many holes you want in your finished sink.
A new kitchen faucet will likely have all the materials you need to complete the installation. Double-check your kit to be sure, however, before you proceed. Always read the installation instructions, too, which will set the correct procedure for installation.
Source: The Spruce