The milking equipment pumps the fresh milk from the cows along stainless steel pipes to another room called the "milk house". In this room is a large stainless steel tank that chills the new milk to 38° F or less. The tank constantly agitates the milk to make sure that the milk's temperature is consistent throughout and to prevent the cream and milk from separating. After every milking session, the stainless steel transfer pipes from the milkers to the tank are thoroughly cleaned by automated equipment.

The milk house tank stores the chilled fresh milk until the milk truck arrives. After every pickup, the tank, like the pipes, is cleaned.