Formulas:

Pounds per square inch at bottom of a column of water

= height of column in feet x 4.34
 

Horsepower to Raise Water*

Horsepower = gpm x total head in feet
                                3960

*For liquids other than water, multiply the gpm x the liquid's specific gravity
 

Weight of Water in a Pipe

Pounds water = pipe length feet x pipe diameter inches² x .34

Back to Engineering Reference Page