Could somebody help me clearly understand pump head i.e static head, delivery head, residual head and friction head . Please give me examples in S.I units. This is for plumbing purposes

I must have fell asleep in my fluid mechanics course.

Here is residual head, a term I never heard of: Pump engineering - residual head on pump-system curve

Static head is easy, it's the force of gravity acing on the water and is dependent on the height of the column.

Friction head is really a loss. It's easier to do the problems if you express it as a length of pipe. Like an elbow is worth a foot of pipe. It is also dependent on flow and dependent on the type of pipe (i.e. smoothness of the wall)

Delivery head: Delivery head