My kitchen sink sprayer is leaking from underneath my sink. We just replaced the spray head part. Could it be the hose or what else could it be?
Thank you!

The sprayer hose just screws into the bottom of the faucet. Is it possible you may have twisted it loose when replacing the spray head. It is tight under the sink but try to reach up between the supply pipe and tighten the hose. Probably will need a flashlight to see what you are grabbing.