Quote Originally Posted by OTEP View Post
I need to measure line pressure as the thing is squirting full blast. When I pull back on the washer switch, I need to see how much pressure the washer pump will be making to drive the water.

Are we talking about the same thing? Sorry, I really suck at math.
yup, we are talking about the same thing.

we are talking about water pressure in a pipe. That can be measured as "head" or how high it can go up vertically

The higher the pressure, the higher in the pipe it will go before it stops.

It is the same way measured for water pumps used in fish tanks and water pond decor pumps as well as water pumps fpr home or commercial use.