Turn the aerator housing counterclockwise and remove it from the faucet. Pull the O-ring off the tip of the faucet spout with your finger. The O-ring prevents leaking between the housing and the faucet. Set the O-ring in a safe place until you are ready to reinstall the housing.
After that, they are referred to as yearlings or stirks if between one and two years of age. A castrated male is called a steer in the United States; older steers are often called bullocks in other parts of the world but in North America this term refers to a young bull.
bull (plural bulls) 1  An adult male of domesticated cattle or oxen. 2  A male of domesticated cattle or oxen of any age. 3  An adult male of certain large mammals, such as whales, elephants and seals.  A large, strong 1  man. (finance) An investor who buys (commodities or securities) in anticipation of a rise in prices. ( slang) A policeman.