The phrase "to run the faucet" means turning on the faucet to let water flow out.
Sentences with «to run the faucet»
At other times of the day, run the faucet for half a minute. (mobimotherhood.org)
Try things like running, jumping, climbing and pouring water or running the faucet while your child is on the potty. (care.com)
A classic chrome faucet features a single pull - down handle as well as modern touch technology that makes it easy to run the faucet even when hands are full. (homebunch.com)