fuel and water; firewood and water
Refers to the basic necessities of firewood and water, often in a historical or literary context. Not commonly used in modern daily conversation.
Travelers in the old days walked mountain paths carrying firewood and water.
gathering firewood and drawing water; kitchen work; housework
By extension, refers to the chores of gathering firewood and drawing water, and more broadly to kitchen work or housework. This usage is literary and somewhat archaic.
To do the work of gathering firewood and drawing water (i.e., household chores).