Sprayer

• The sprayer is the main part of the faucet, the part from which the water comes out of the pipe. Make all the connections required for the faucet before installing the faucet itself in the sink. This is especially the case if the faucet has a separate sprayer hose, which is difficult enough to install on its own, let alone in a deep sink and with a faucet in the way.
  
  First, place the sprayer base in the proper hole in the sink. If you have an old sprayer base that still looks good and fits the new faucet, feel free to use it rather than installing a new one. However, if you need to remove the old sprayer base, ensure that the new one is well surrounded by plumber's putty to keep it in place. After the base is in place, insert the sprayer hose and attach it to the faucet.
  
  

Attaching to Plumbing

• For ease of installation, don't use copper or chrome inlet tubes to connect the faucet to the shut-off point unless you're a really handy person or a professional plumber. These tubes are difficult to align and they need to be bent in just the right way or else leaks are likely to occur.
  
  Instead, use flexible "bladder-type" hoses, either plastic covered or stainless steel ones that are more burst-proof. When you've finished connecting the faucet to the water supply, ensure that it can pull up and down freely and that it isn't tangled. If the hose is stiff, run hot water through it and it should become pliable again.
  
  

Final Checks

• Before your faucet is ready to go, you have to check for leaks. Before turning on the water supply, ensure that all connections are tightened. Also, remove the aerator from the faucet and ensure that any debris that may have accumulated in the water lines during installation is flushed out.
  
  Turn on the faucet and then slowly turn on your water supply. Be vigilant for leaks and if you spot any, turn off the water supply and tighten the connection before turning on the water again. Repeat this until there are no leaks, even with the water at full pressure.